How Much Weed Can You Get From One Seed


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The average yield over a cannabis strain depends on various factors. But how much weed does one plant produce? Check it out! Tips to increase your marijuana plant yields and get top-shelf buds. Find out how much weed does one plant produce? Where to buy the best cannabis seeds. How much marijuana does one plant produce? This article discusses some of the variables that will impact the final harvest of your cannabis plants.

How much weed does one plant yield

One question on every beginner grower’s mind is how much does one marijuana plant yield? On average, a plant will produce 907.2 grams, or 32 ounces, of wet weed. For dry weed, you could get an average of 181.4 grams or 6.4 ounces.

Nevertheless, the yield size of each plant will be different from one another. You could harvest less or a lot more. When you are growing a cannabis plant, various factors can determine the amount of your yield. Elements such as genetics and training can propel you to a bountiful harvest.

How to Estimate Weed Yield?

There are two ways to masure yield.

1. Masure yield by the strenght of grow lights

One way to estimate the yield is by measuring it relative to the strength of your grow lights. Fortunately, the calculation is easy to do.

To measure it, calculate the total weight of the dried weed in grams. You could do wet weed, but it loses weight as it dries into the final product. Then, divide that weight by the bulb’s wattage. Here is a better visual of the formula:

Total weight of dried weed ÷ Watt = Yield size per watt

If you are using more than one lamp to grow the plants, add all the watts together. For example, two 400W bulbs would be 800W. If one plant produced 100 grams of cannabis, the calculation would be 100g/800W = .125g/W.

2. Masure yield by cubic feet

Growers also can estimate the yield of a plant relative to the size of its container. To start, you should calculate the volume, or cubic feet, of the pot. Multiply the surface diameter by the diameter across the bottom. Then, multiply the number by the vertical height.

Divide the dried weight by the cubic feet of the container. The formula would be:

Total weight of dried weed ÷ Cubic feet of the pot = Yield size per cubic feet

For example, a plant has 100 grams in dried weight, and the pot is .59 cubic feet. 100g/.59cu ft = 169.49 g/cu ft.

Factors That Determine How Much Weed one Plant produces

You can influence how much you harvest to a degree. Some aspects of marijuana cultivation contribute to yield size. The factors that come into play are:

Genetic Quality

The genetic quality of a weed seed can provide the future plant with various potential traits. One of those traits can impact the yield size of cannabis. There are three main species of marijuana plants: sativa, indica, and ruderalis. Growers tend to stick to sativa and indica, but a sativa plant is better for harvest size.

It is not uncommon for people to create hybrid strains. Hybrid plants can have attributes that maximize yields on top of increasing the aroma. The type you might want to consider using is a feminized strain rather than an autoflowering one.

Feminized seeds mean that they are designed to get rid of male chromosomes. As a result, only female plants get produced. It may seem strange, but feminized seeds can boost your yield in the end. While they can be more vulnerable to environmental stress factors, they save you work and are less prone to crop loss.

If you are growing indoors with limited space, the genetics of a feminized strain is essential for the yield. Of course, the genes can bring out other great characteristics of a plant, such as cannabinoids and flavors. A feminized strain of the sativa species is one of the best options for a grower such as yourself.

Growing Indoors or Outdoors

Outdoor and indoor environments can offer benefits in terms of yields. Growing weed outside can help make sure the plant completes its growth cycle. However, you need to time the moment you plant. Starting in the early spring can give it enough sunlight and time to go through each stage.

Plants tend to have more room and a longer duration to grow. The natural environment often leads to an increase in yields. Still, your plants are at the mercy of the weather, bugs, or animals. A great harvest needs suitable surroundings at all times. In some cases, growing marijuana indoors can improve yield size since it lowers the risk of crop destruction.

When growing inside a room, you have control over light cycles, temperature, humidity, and CO2 levels. Not to mention, you can enjoy the production of high-quality buds. You can use other yield-influencing factors to maintain a consistent yield.

Unlike the outdoors, the indoors allow people to have multiple harvests a year. However, growers can face a limited area to grow plants. Both methods can impact yield size in different ways, and it is necessary to determine which one is best for you.


The energy fuels plant growth, but the amount of light can affect how much you harvest. Too little or too much can hinder the development. Different aspects of light work together to fuel the growing cannabis. For instance, increasing the intensity can have a positive effect. You can see better yield results in the plant.

The quality of the light you use can influence your plant’s growth, metabolism, and morphology. Red and blue lighting can be the best options for improving yield as well as THC concentration. Some growers use LED lamps, and others have HPS lamps. LED lights can lead to better yields while saving energy.

If you are growing marijuana outside, the sunlight can lead to more vigorous growth. More direct sunlight means better chances of a high yield in the end. About 10 to 12 hours of sunlight a day can do the trick. Of course, a couple of more hours may have a positive effect on the harvest.

Plants should not get less than five hours of sunlight as well as less than five hours of indirect light. Make sure to choose the sunniest side for the weed garden. The light cycle plays a role in the yield size as well. A cannabis plant requires periods of uninterrupted darkness. The amount of darkness can lead to it deciding to remain in the vegetative phase or begin flowering.

Once you have a cycle of 12 hours of light and 12 of darkness, the plant will think it is time to flower. It needs enough time for this stage of development to maximize the yield.

Growing in the Open Ground or Pots

Some marijuana growers put their plants in a pot, and others grow them in the ground. Both ways can have a role in how much you can harvest at the end of the process. Growers may choose pots since the containers allow for easy portability. Pots can give you more control when it comes to the health of the plant.

You can fill the container with soil that consists of the right amount of nutrients. Not to mention, the root system is more likely to remain healthy. These factors can result in cannabis getting bigger. The size of the pot matters as well. The larger the pot, the more room the plant can grow.

However, you may want to go with planting the marijuana in the ground. You can achieve the maximum potential yield with the chosen strain. Pots can restrict how big the plant gets, but the ground offers the root system more freedom to spread out.

The open ground is restricted by the seasons, so a large yield is time-sensitive. Overall, you are more likely to attain a true cannabis giant if you choose the ground over pots.

Length of the Vegetative Stage

There are multiple stages of cannabis growth, and the second to last one is the vegetative phase. This stage can last anywhere from 3 to 16 weeks, and it is the period where the stems and leaves emerge. The plant’s growth takes off during the first couple of weeks. It matures to the point where you can see if it is male or female. The plant needs plenty of air, water, and nutrients.

What does the vegetative phase have to do with the size of your weed yield? The vegetative phase requires the most monitoring since it sets up the flowering stage. It is the most necessary stage in terms of maximizing yield. A productive vegetative stage means a large and healthy plant. A bigger plant means you can get the most out of a harvest.

Growers feed cannabis plants certain nutrients during the vegetative phase. One of the nutrients you will need to provide more of is nitrogen. Nitrogen promotes the growth of the stems and leaves, and growers take the time to prune sick leaves. It is also the phase where you would train the plant.

How big and healthy the cannabis plant gets in this phase also relies on other factors, such as indoor and outdoor cultivation.


The purpose of fertilizers is to supply the soil with more nutrients, especially if a plant lacks a specific one. Outdoor growers might add a powder version when transporting the crops outside. However, some choose not to since certain strains can easily get burned with nutrients. Too much, in general, can damage the plant.

It is necessary to wait until the vegetative stage to add fertilizer since the product will hurt any seedling. Some may wonder if fertilizers have an effect on how much you will be able to harvest after the weed finishes flowering. The products can play an essential role in correcting any nutrient deficiencies, allowing for better growth.

There are different types of fertilizers. The organic kind helps boost the aroma, but mineral fertilizers are the better option for plant size and yield. It can add more nitrogen and phosphorus, which promotes bud growth.

However, the mineral version often leaves an unwanted taste when it comes time to consume the plant. Washing out the roots a couple of weeks before the harvest can help reduce the odd flavor.

See also  Blueberry Marijuana Seeds


As talked about before, training is a process growers do when the plant hits the vegetative stage. Plant training involves a set of techniques to alter the marijuana plant physically for a greater yield.

There are three main types of training: bending and securing, damaging or removing, and manipulating timelines. The categories can get broken up into individual techniques. They include but are not limited to:

  • Screen of Green (SCROG).SCROG is a technique where a grower places a screen over the plant. You would weave the stems through it as the crop grows. The plant will have a flat shape, which is perfect for numerous bud sites.
  • Low Stress Training (LST).LST involves bending the tall stem down and away as the plant grows. It should be done early in the growth cycle while the stems are flexible. The plant will have a flat, wide shape to allow for multiple colas to sprout.
  • Supercropping. Growers do a more extreme type of bending when supercropping. You might use this method if the stem is too tall and hard to tilt. Growers soften it up a bit before curving it at an angle.
  • Topping.Topping involves damaging the plant when it is very young to promote various buds. You would remove the top of the seedling’s main stem. The plant will form two main stems instead and grow more than one cola.
  • Fimming. There is another damage technique that is similar to topping which is called fimming. The top of the main stem gets shaved instead of removed. Fimming is less likely to stress the plant, but there is a chance it might not cause multiple cola growths.
  • Defoliation. Defoliation means you would remove the largest leaves from the plant. People usually do it during the first month of flowering. The process promotes the buds to grow bigger.

Growers sometimes employ more than one technique to increase a plant’s yield.

Let’s get growing!

Now that you know more about how much one marijuana plant will yield, you can start growing some plants. The process can mean a lot of involvement, but the results are rewarding! Any time is a great time to begin.

Look at some other tips if you want to know more about growing cannabis plants during each lifecycle stage. Or check our online cannabis seeds catalogue to see all the types of seeds you can buy and enjoy a healthy and prosperous strain.

How Much Weed Does One Plant Produce & Ways To Get Huge Harvests Each Time

Looking to get more bud for your buck? If you only have a small grow area, you’ll want to know how much weed does one plant produce. Cultivating cannabis takes effort and should be rewarded with enough smokables to warm you up through the winter.

We’ve got expert tips to get the most out of your cannabis herbage and how much reward to expect from one plant. Read on as we unpack the influencing factors and ways to manipulate them, so you get the highest yield possible.

How much weed does one plant produce: average marijuana plant yield

The average marijuana plant yield isn’t a simple figure to report. Marijuana plant yields vary depending on genetics, grow medium, and climate. Mediums like hydroponics typically give bigger harvests and more aromatic buds.

The average marijuana yield per plant generally falls into three categories: indoor, outdoor and hydro. Note these are estimates, and actual yield depends on numerous factors.

Let’s go through the three common growing styles and closest approximations of the average marijuana plant yield.

Average yield per plant indoor in soil

How much weed does one plant produce indoors? Insidelants don’t enjoy the same freedom of space as outdoors. Grow tent capacity and light wattage determines how much weed comes from one plant. You’ll typically reap anywhere from 3.5–4 oz per plant when cultivating indoors.

Lighting is of the essence in a grow tent. With proper care, you’ll get around 0.035 oz per watt of light. Using a common 600-watt lamp bumps the yield up to around 21 oz per plant.

Better light means bigger yields, so investing in a brighter lamp like 1200 watts can produce up to 42 oz of smokable buds.

Soil is a popular growing medium because it’s simple and holds nutrients well, but it doesn’t yield as high as hydroponic mediums. Using the right equipment, adequate nutrition, and efficient use of space improves the average marijuana plant yield.

Average yield per plant outdoor in soil

The great outdoors form the natural habitat of marijuana plants—free space, bountiful sunshine, and hydrating rain. Learning how to grow cannabis outdoors is crucial for all cannabis growers.

How much weed do you get per plant outside? Outdoor cultivation isn’t for everyone, but if your weather conditions are satisfactory, you can rejoice with around 17.5 oz of succulent buds per plant.

Growing cannabis on your balcony will suffice but cultivating somewhere outside with at least two meters of space is best. The biggest benefit of outdoor rearing is you can grow more plants, and they’ll have ample room, boosting the cannabis plant yield.

A pro tip for better outdoor marijuana plant yields is germinating the marijuana seeds indoors in advance because seedlings need controlled humidity levels. Germinating before spring gives plants more time to grow outside during better conditions.

Average of hydroponic yield per plant

Hydroponics is a major bud booster that entails planting in a nutrient-dense liquid. How much weed does one plant produce using hydro? Compared to soil, hydroponics boosts the yield by up to 20%, giving you 24 oz per plant using 600-watt lights.

Why does hydroponic growing change the average marijuana plant yield so drastically? It provides the optimal moisture-to-air ratio giving roots plenty of room to breathe and easily absorb essential nutrients.

Finding the proper nutrient ratio and maintaining pH levels makes hydro more complex than soil growing. Experienced growers can use hydroponics to increase how much weed comes from one plant.

What affects marijuana plant yields

How much does one weed plant produce? These six main factors play a significant role in bud bulk:


One of the essential factors determining how big, tall, or generous marijuana plants are, is genes. If it’s a low-yielding strain, no matter how much light, space, or gardening skills you use, nothing changes how much marijuana you get per plant.

Sativa strains are usually tall fast growers with slightly lower yields than their bushier counterparts. Indica strains tend to be shorter slow growers with more generous yields. Autoflowering cannabis seeds limit how much weed comes from one plant but their rapid growth cycles mean faster, more frequent annual harvests.

Level of expertise

Practice makes perfect. You’re allowed to make mistakes and use trial and error when you start your cannabis-growing journey. Seasoned growers know their way around lighting, nutrients, techniques, and increasing how much weed they get per plant.

It takes time to learn how to deal with unexpected problems like nutrient deficiencies or mold but don’t despair. You can learn how to make buds bigger during flowering, and after a few tries, you’ll be rolling in potent nugs.


Both outdoor and indoor growing produces high marijuana plant yields if you use the best techniques for the environment. There are pros and cons to each setting.

Growing outdoors is a popular choice, especially for first-time growers. Here are some pros and cons of outside cultivation:

  • Larger space to grow more plants
  • Natural light (sunshine)
  • Economical
  • Easy growing
  • Depends on seasons
  • Unexpected weather conditions
  • Higher chance of pests and mold

Indoor growing is becoming increasingly popular, especially among experienced growers. Here are some of the pros and cons of indoor growing:

  • Easily hidden from neighbors
  • Control lighting to increase the average yield per plant indoors, even with soil
  • Odor filtration is easier (perfect for dank strains)
  • No surprise weather conditions since you’re in charge
  • Setup can be complex for beginners
  • Equipment is costly
  • Knowledge of techniques like low stress training (LST) is crucial.

Grow medium

The two most common mediums are soil and hydro. Both options have unique benefits helping you nurture greenery according to your experience level and budget. If you want to know how much weed does one plant produce, you must consider the medium.

Soil cultivation is the oldest and most natural method. Most plants are grown in soil as it’s affordable, easy, and gives substantial marijuana plant yields. It’s ideal for beginners because it doesn’t require complex knowledge like hydroponics.

Want aromatic, tasty buds? Soil won’t just give you a high average pot plant yield; you’ll get flavorful buds too. Your plants will be more prone to mold, pests, and diseases, but you can easily prevent them with the right nutrition and care.

How much weed does one plant produce with hydroponic growing? A bounty of buds is coming your way if you put up with the high commitment of this medium. It nourishes your plants like nothing else, creating extremely potent nugs.

Hydroponic cultivation may provide a high marijuana plant yield, but it can confuse beginners. Installing and maintaining the setup takes time, knowledge, and a bigger budget. Once you get the hang of it, the insanely juicy buds from hydroponic growing are worth the effort.


Getting a marijuana plant yield that’s not just high in numbers but has exceptional quality comes down to nutrition. Why is this so important?

Nutrients and micronutrients provide energy so your plants can bloom, protect themselves from diseases and produce bigger harvests. Marijuana plants go through different stages and require more or less certain nutes. For example, more potassium and phosphorus help them in the flowering stage, giving you a healthy cannabis plant yield.

Maintaining a pH level between 5.5 and 6.5 is just as important as feeding your herbage the correct nutrients. A balanced pH helps the roots to absorb vitamins without overfeeding. Avoid chemical fertilizers and stick with organic nutrients to make pH balancing easy.


The amount of light determines how much weed comes from one plant. Light helps marijuana plants grow, and flower but too much or too little stops the flora from flourishing. If you live in a Mediterranean climate or somewhere with at least 10–12 hours of direct sunlight, your plants will thrive outside.

See also  Weed Seeds

With outdoor growing, your hands are tied when it comes to lighting because the only source is the sun. Indoor growers have more control and can maximize how much weed they get per plant by increasing light intensity and times. Here are some tips for indoor growers to get the most out of their lighting:

  • Place bulbs close together to increase intensity.
  • Rearrange plants or use the Sea of Green technique to ensure taller plants get equal access to light.
  • Follow a weed light schedule to meet your plants’ lighting needs at various stages.
  • Prune bushy foliage, so branches aren’t covered from the light.
  • Use a lux meter to measure brightness and adjust light in areas that aren’t getting enough.

Finding the ideal wattage is essential because optimal light levels give you healthy plants with high-quality marijuana plant yields of aromatic buds. Here’s a simple guide to finding the best wattage considering the number of plants you have and the space you’re working with:

Grow area (m²) Number of plants Recommended wattage
0.5–1m² 2 250W
1–1.5m² 4 400W
1.3–2m² 8 600W
1.8–3m² 10 1000W

How to estimate the yields of your weed plants

There are many ways to determine how much weed comes from one plant, but most growers consider lighting indoors and pot size when growing outside. Note that once buds are dried, they become much lighter. To estimate how much you’ll end up with after curing, multiply the weight of fresh buds by 0.25.

How to calculate indoor yield estimates

If you know how to grow cannabis indoors, you’ll know lighting is the most important step to master because it determines marijuana plant yields. You can calculate the average yields by the intensity of your lights.

Of course, other factors like growing experience influence the possible harvest. Experienced growers typically get double the yield beginners get. Space, nutrients, and strain type influence the average yield per plant indoor in soil or hydroponic setups.

Here’s a general guide to estimate your indoor yield according to HPS lighting:

Lighting wattage Growing space Approximate yield
250 W 1x 0.5 x 2 m 3–9 oz
400 W 1 x 1 x 2.5 m 4–14 oz
600 W 1.3 x 1.3 x 2.5 m 5–21 oz
1000 W 1.5 x 1.5 x 2.5 m 9–36 oz

How to calculate outdoor yield estimates

Calculating the average marijuana plant yield outdoors is tricky. Generally, growers use five-gallon pots and get around 3.5 oz of dry bud per plant. Some strains can give you up to 59 oz per plant outdoors, so it mainly comes down to genetics and care.

How to maximize the yields of marijuana plants?

Increasing how much weed grows on one plant involves working on all factors of marijuana cultivation. It’s challenging to predict your harvest accurately, but you can take steps to ensure you get the best buds possible.

Here are four tips to maximize your cannabis plant yield:


Getting a huge harvest of potent buds begins long before you know when to harvest cannabis. It starts with using high-quality marijuana seeds and germinating indoors for healthy seedlings. Once seedlings are ready to plant, ensure the following factors are ready:

  • Nutrients
  • Training techniques
  • Ventilation
  • pH levels
  • Lighting

Grow fewer plants

Less is more, especially when it comes to optimizing the marijuana yield per plant. More greenery requires more lights, and that’s not always feasible.

Growing a few plants allows you to focus more on caring for them, and they’ll get sufficient light. You’ll get a higher marijuana plant yield with fewer plants and more light than with more plants and less light.

Increase lighting

Use high-intensity discharge lights to get the highest possible cannabis yield per plant. Using 600-watt lamps spaced evenly gives plants equal light feed. Ensure adequate ventilation because they need enough CO2 to convert the light to energy.

Train plants

Marijuana plants naturally grow upwards with one main cola and many branches that typically don’t get even amounts of light. This apical dominance hinders the growth of the bottom buds. Training plants help them grow so that each branch gets enough exposure.

The Sea of Green (SOG) method is a popular technique for indoor growers to increase how much weed they get per plant. It involves training herbage to grow horizontally using a mesh screen, so all buds grow with the same amount of light.

LST is a popular method for many outdoor growers, which requires bending the plants over time and tying them down. This technique makes plants grow laterally, so there’s even light distribution. Usually, the bottom buds are frail because they don’t get enough light, but with training techniques, you get all potent, juicy nugs.

May your harvest be bountiful

Maximizing your marijuana is obtainable with a few tweaks to your growing methods. Powerful lighting, adequate nutrition, and training techniques are crucial for increasing the overall marijuana yield per plant. With practice and dedication, your cannabis plants will reward you with huge harvests.

As important as your growing method is, you won’t get glorious yields with mediocre seeds. Check out the top-quality cannabis seeds at Homegrown Cannabis Co., and you’ll be swimming in pools of plump buds in no time.

Share this article on social media and follow us on these social channels to join a community of passionate growers. Subscribe to our newsletter for your daily scoop of cannabis news and visit our blog to answer all your questions.

Head to the HMG store and start growing the finest marijuana today!

About the author: Derek LaRose

Also known as Kronic from The Cannabis Kronicles, Derek LaRose is a young ambitious cultivator and a staple educator for indoor cultivation.

How Much Weed Does One Plant Produce?

“How can I grow as much weed as possible?” You know that’s what’s on your mind when you ask or wonder about plant yield. Old and new marijuana growers (and scientists and politicians ) alike want to know how to get the highest yield per plant and per grow. Planning and practice can make a huge difference– especially when you are only growing one plant!

But, ultimately let’s not forget that the cannabis plant is a sentient being. She’s alive! Her growth is dependent on many factors and the same plant can produce a pound in one situation and a couple grams in another. Below we will detail the known factors that impact yield and potency, discuss where things can go wrong, and where things can grow right.

What is yield? (wet vs. dry yield)

Yield is the amount of weed you get when you harvest your marijuana plants. This is only the buds themselves, removed from the stems. This is most often measured once your marijuana buds are dried and trimmed. This is generally measured in grams, ounces, and pounds. The “lid” is not a used measurement anymore.

One of the most know measurements currently is an 1/8th (of an ounce) which is 3.5 grams. This is commonly found in dispensaries as well as something one might purchase from their friendly neighborhood weed guy. In this picture below, only two perfectly grown and cured buds were needed to reach this weight!

Wet and dry cannabis does not weigh the same.

Immediately upon harvesting, your buds will be quite heavy. That’s because, like humans, freshly harvested cannabis flowers are 75 – 80% water by weight. Once dried and cured, the actual harvest you get is about ¼ of the wet weight. So, if your harvest weighs out at an ounce at first cut, when it’s all said and done, you will have a quarter ounce of homegrown weed to smoke.

To estimate your dry yield from your wet yield, just multiply the wet yield by 0.25 to get an idea of what you’ll have to share with your friends (or stash away for yourself)!

This varies slightly depending on if you grew a sativa-dominant or an indica-dominant strain. Sativas are notoriously more airy so if you weigh your sativa harvest wet, you will get 20 – 22% dry. Indicas tend to be a bit chunkier so if you weigh your indica harvest wet, you will get 22 – 25% dry.

​​Yield vs. Potency

Yield is an important factor to consider because cannabis is an annual crop; there’s only one harvest per plant. After harvest, the plant is dead and returns to compost. Yield is the weight of the buds that you harvest. Yield should not be confused with the potency of these hefty green nuggets. Potency is the strength of the cannabinoids found in the trichomes on your cannabis buds.

In other words, you can have a high yield of low potency buds. Or you can have a low yield of high potency buds. In a perfect world, you’d get a high yield of high potency buds and we are going to discuss how to make that happen!

What to do to increase your weed plant’s yield?

Let’s get the most out of your homegrown medical (and recreational) marijuana. Best plant performance and yield are the result of growing the right strains under the right conditions. The most important factors being: light, plant density, fertilizer, temperature, duration of the flowering growth stage, and plant variety. In sum, the TLDR version is:
blast as much light as you can afford, grow less plants to fill your space appropriately, feed your plants just enough but not too much, keep the space not too hot and not too cold, don’t harvest early, and don’t buy shit genetics
(bag seed gamblers are included!)

Light to Increase Weed Plant High Yield

The yield from an indoor-grown cannabis plant largely depends on the light the plant receives. Cannabis plants, being photosynthesizers, receive all their energy to function from light.

The type, quality, and amount of light you provide your marijuana plant directly influences yield and should not be taken lightly (see what we did there?)

Sunlight is the most powerful light us earthlings have access to, so if you are able to give your plant direct sunlight, do it! Sunshine is also free, and that is a big plus. The only downside is that we cannot control cloudy or rainy days and winter makes it challenging to grow with the limited amount of sunlight (the freezing temperatures also don’t help).

See also  Cannabis Seeds New Mexico

Moving to an indoor grow environment, w hen it comes to lighting fixtures, it does not benefit you to get the cheaper option. And we know how challenging it is to pick the right light- – there’s so many options out there! (incandescent, CFL, HPS, LEDs)

We do not encourage growers to use incandescent light bulbs when growing indoors. To get enough energy for your plant, the bulb would put off too much heat and not be fun to see on your electric bill. CFL bulbs are equally useless. Stick to new technology to protect your plants and your wallet.

While HPS light fixtures are historically the choice for those who want to maximize their indoor cannabis crop harvest, they are slowly fading out from commonplace. An experienced grower can expect to harvest a gram of weed from each watt of HPS light provided to the plant. This means that if the light is a 400-watt HPS bulb, then 400 grams of weed could potentially be harvested. However, LED light technology is getting more advanced. LEDs are: 1) cheaper to run than HPS and 2) run cooler than HPS which also lowers the cost of air conditioning and 3) reduces the likelihood of burning your plants with too much light.

When choosing an LED light fixture for your weed plants you are up against a surplus of options and information.

The most important metrics to look for in a lighting fixture are PPF, PPFD, and energy usage/efficacy . If none of these are present, you may want to look at a different fixture.

PPF, PPFD, and photon efficiency are measurements related to PAR. PAR is photosynthetic active radiation. PAR is not a unit of measurement but instead defines the type of light needed to support photosynthesis.

PPF is how much PAR a lighting system produces each second. This is not often listed as it does not show how much of the measured light actually lands on your plants but is a useful metric to calculate how capable a light fixture is at creating PAR.

PPFD (photosynthetic photon flux density) is the measurement of how much PAR actually arrives at your plant. This is a spot measurement and is typically highest at the center point beneath the light and decreases as light ripples outwardly. This changes with the distance away from the plant. Ideally, the higher the better but a single measurement won’t tell you much– you want the average taken from many measurements throughout the coverage area.

Photon efficacy is a way of defining how good a lighting fixture is at converting the electrical energy into PAR light that your plant can actually consume. This is not often listed in the spec sheet for most lights. Instead, most light manufacturers list the wattage, either total electrical watts or watts per square foot. Knowing the wattage is good to budget the main cost of your indoor cannabis grow. But the wattage doesn’t give the best information about the quality of light as watts are a measurement of the energy coming into the light fixture (from your electric bill) where photon efficacy is how good the light is at giving your plant energy.

We suggest paying attention to whether or not the company you want to buy a light from lists the actual wattage or the watt equivalent. (Hint: if they are only disclosing the watt equivalent, the light is most likely not strong enough for cannabis.)

LED wattage and incandescent wattage aren’t the same.

Many LEDs are marketed with their “incandescent equivalent” wattage, referring to the brightness of the LED. For example, a 10 watt LED may say “75 watts” on the package and in fine print say that the brightness is equivalent to a 75 watt incandescent. But for growing cannabis, you’re going to want an actual real 75 watts (or higher!) from your LED lamp .

Can I give my weed plant too much light?

The answer in fancy, science talk:

Effectively, within the range of practical indoor PPFD levels—the more light that is provided, the proportionally higher the increase in yield will be. Therefore, the question of the optimum LI [light intensity] may be reduced to more practical functions of economics and infrastructure limitations: basically, how much lighting capacity can a grower afford to install and run? – Victoria Rodriguez-Morrison, David Llewellyn , and Youbin Zheng

In plain English:

No, not really! For a vegging photoperiod cannabis plant, you will want to give her a minimum of 18 hours of light a day– some give 20 hours or even keep the lights on 24/7. We know that a lot of good growth happens during the dark period when the cannabis plant has time to rest so we suggest either a 18/6 or 20/4 light cycle for photoperiod cannabis in the vegetative stage.

Same goes with autoflowering cannabis, with an autoflower seed indoors, you’ll want to give it 20 hours light / 4 hours darkness each day.

When it comes to using light to maximize yield, maximize the light intensity to meet your budget.

Grow Less Cannabis Plants to Get More Weed

In some ways you may think that if you pop more marijuana seeds or get more clones that you will get a bigger harvest in the end. This is not always true.

Each cannabis plant wants her own space. Planting more than one seed in a pot leads to competition between plants for the shared nutrients and reduced yields. As seen in this photo below where two seedlings starved each other and both ended up dwarfed:

The size of the container that you grow your pot in matters, too. Outdoor plants have the potential of reaching extreme oak tree size when planted directly in good soil (which can be hard to find) and allowed to flourish in an open, sunny space. Indoor cannabis plants, become much like a goldfish in either a fishbowl or an aquarium or an ocean, you will grow a different size plant from the Mini Complete Pot Grow Kit (1/2 Gallon) to the Medium Complete Pot Grow Kit (5 gallon) or the Large Complete Pot Grow Kit (35 gallon) . The bigger pot, the bigger plant (and the more pot).

Growing in a grow tent, consider the total space as well as the size of your containers. It may sound like a good idea to pack a small 24’’ x 48’’ x 60’’ tent with as many pots as possible but this will limit the canopy space for your plants to fill. Best to give each pot space for the plant to fill out.

Growing less plants means:

  1. A longer vegetative stage. This means bigger plants. Bigger plants have bigger harvests and higher yield. When growing photoperiod cannabis indoors, it is time to transition your tent to flower when the tips of the leaves of each plant begin to touch. More plants touch each other faster.
  2. Less plants to manage! You know each one personally and can tell when even the slightest thing is off which means you can catch pests and diseases before they become a major problem. This also means that you will have more time for defoliation and advanced pruning techniques to maximize your yield!

In the same space with a 600 watt HPS lamp, you can either get 37.5 grams from 16 plants, 150 grams from four plants, or a pound from one single plant! Don’t compromise on plant density; the more space you give a single plant, the more she can blossom.

Best Grow Mediums to Maximize Harvest

Yield can also vary based on the particular grow medium you use. It has been clearly documented that using hydroponics to grow marijuana can result in 20 percent more yield compared to using soil indoors.

Hydroponics increases yield because it is the most efficient way to feed plants. The grower supplies all the nutrients that the plant would naturally need to find for herself in the soil.

But, hydroponic systems are also 1) more expensive to set up and run, 2) can take time (like several runs) to dial in a nutrient feeding schedule and 3) can go wrong if your plants are fed too much.

At the simplest level, fertilizers come in varying NPK (Nitrogen, Phosphorous, and Potassium) formulations. Fertilizers that are richer in nitrogen are ideal for the vegetative phase, and those richer in potassium are better suited to the flowering phase. Growing hydroponically you need to know which nutrients your cannabis plants need during their different stages of growth and have that ready.

Whether you opt for organic, inorganic, or a mixture of the two is more of a personal decision. The important thing is that your marijuana plants receive enough nutrients to give you a higher yield per plant, but never too much. Unlike light intensity, there is a sweet spot for nutrients when it comes to growing marijuana. Too much of a good thing can negatively impact your plants. Unfortunately, finding the right balance between enough nutrients and excess nutrition usually comes with experience.

Soil grown marijuana can pull down some epic yields as well. But not all soils are created equal. For example, one person growing marijuana in loam soil may have a richer harvest since loam soil is easy for the roots to penetrate. On the other hand, clay soil could lead to a dismal yield since it doesn’t easily drain and can be quite compact, making it difficult for cannabis roots to grow.

That’s why a Pot for Pot specially formulated our Superb Soil to contain just the right amount of nutrients to maximize cannabis growth. With a Pot for Pot grow kits, there’s no need to add additional fertilizer because their soil has everything your plant needs from seed to harvest . It isn’t just easy to use, it’s optimized for marijuana growth.

Our complete grow kits include everything you need to go from seed to your very own supply of high grade medical cannabis.

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