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How Much Cannabis Does One Plant Produce

September 13, 2019

Many people are interested in growing cannabis plants for different purposes. For some, it is for medical use, while for others, it’s recreational. There may even be some that grow marijuana simply because it is fun to grow. 


Regardless of why you are growing, you are likely to wonder and ask the question, “How much marijuana does one plant produce?”, and it is not a crazy question to ask. It’s simply good planning to know what to expect to harvest from each plant. That way, you can decide whether the reward will be worth the effort. Maybe it makes more sense to stick to dispensaries. 

With marijuana being legal in so many places, it makes sense for questions like, “How much marijuana does one plant produce” to be at the forefront of so many people’s minds. The problem with this question is that there is no straight answer to it since your yield will depend on several variables. One person could yield a pound of weed from a single plant while another person struggles to produce 40 grams from the same marijuana strain! Therefore, if you truly want to plan, you need to understand what you are up against. 


This article discusses some of the variables that will impact the final harvest of your cannabis plants.


👉Related: 11 Cannabis Growing Tips You Need To Try In 2019

The Environment and Indoor Plant Yields


cannabis grow lights


The yield from an indoor-grown cannabis plant largely depends on how much light the plant is receiving. When using artificial lighting, for example, 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, this isn’t the only variable at play; other factors could lower the yield even though you had plenty of light.


The Grow Medium

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


There are many reasons why a hydroponic medium produces higher yields indoors. One reason is that hydroponics lets the roots grow as extensively as necessary to support denser buds since those roots don’t have to force their way through hard soil. Another is because it is easier for marijuana plant roots to access nutrients in a hydroponic system.


Hydroponics is ideal for producing the highest yield indoors, but variations in other mediums can also impact results. This is because the actual growing conditions in those mediums could vary. 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.

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The medium that you choose to grow your cannabis plant in can make a significant impact on the final results. You shouldn’t even be thinking about the question, ‘how much marijuana does one plant produce’ if you aren’t already thinking about your medium. That’s why a Pot for Pot includes Superb Soil with their Complete Kits. It isn’t just easy to use, but it’s also optimized for marijuana growth. 


Ready to start growing, see what a Pot for Pot has to offer!


growing outdoor cannabis

Take your plant outside

If you want the highest yield, consider growing your plant outdoors. Generally speaking, marijuana plants that are grown outdoors produce 500 g more than those grown inside. When growing outdoors, space is an important issue, so you’ll need to give each plant at least 1 square meter of space so they can thrive and maximize their yield.


👉Related: 15 Pros And Cons Of Autoflowering Seeds

Other Factors Impacting Yield 


Whether you plan to grow your marijuana indoors or outdoors, the quality of your genetics – whether they are seeds or clones-- will greatly impact the quality and quantity of your harvest. For example, one strain may have the potential of 600 g/m2 indoors while another strain has the potential of 900 g/m2 indoors. In another, more dramatic example, some outdoor plants have the potential to produce a 6-pound harvest, while others will never go past 2 pounds.  


If you are seeking the highest yield, it helps to select genetics with the highest yield potential.  If you need help finding seeds, a Pot for Pot includes discounts to some of the best seed banks worldwide, so you can start strong. 


The Number of Plants You Grow

Having fewer plants can increase your yield per plant. One reason is simply due to space. The bigger a cannabis plant can grow, the more buds it can support (meaning a bigger yield). This could also explain why plants that are grown outdoors routinely produce bigger yields than those grown indoors.


Indoors, if you have four plants, for example, they could take longer to start flowering because the leaves of the individual plants will take longer to start touching (as they grow wider). This means the surface area from which your buds can form will be bigger, and therefore you could potentially get a higher yield from each plant.


Additionally, having fewer plants makes it easier to devote all your energy towards optimizing the different conditions, so that your plants can reach their yield potential. Your harvest could be considerably higher than the yield of another person who spreads themselves too thin in a vain attempt to take care of too many plants.


However, there is a possible downside to growing a few plants to maximize your harvest. If one or more of those few plants died (due to disease, for example), your yield expectations will take a major hit. So, watch your plants and care for the ones you have. 


Your Skill as a Grower

It would be unrealistic to expect a beginner grower to get the same yield per plant as an experienced one. Yield increasing skills such as pruning and training take time to master. Therefore, those new to growing marijuana should always expect yields that are slightly lower than the absolute best. As your experience increases, however, the yield should as well. 


The Temperature

Temperature also plays a big role in the quality and weight of the yield that you harvest from each plant. While the ideal temperature range could vary from one strain to another, generally speaking, a daytime temperature range of 72-78°F is best. This temperature should drop by up to 10 degrees in the evenings (when it is dark). These numbers can vary based on strain, so be sure to check for your ideal temperatures before you grow.  


👉Related: Top 10 Lights For Growing Weed Indoors

Relative Humidity

The relative humidity is also a factor for optimizing the yield from each plant. Some strains do better in locations with low humidity, whereas others may prefer higher humidity levels. A good range is 45-55 percent.


It is a good idea to reduce the relative humidity a bit during the last two weeks of the flowering stage. This helps protect the buds from the problems that result from high humidity, such as mold growth.


The Nutrients

Just as a person needs food to grow, so do cannabis plants. The required nutrients are normally provided by applying fertilizers. At the simplest level, fertilizers come in varying NPK (Nitrogen, Phosphorous, and Potassium) formulations.


For example, fertilizers that are richer in Nitrogen are ideal for the vegetative phase, and those richer in Potassium are better suited to the flowering phase. Know which nutrients your cannabis plants need during their different stages of growth and have that ready in case they need it. 


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. 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.  That’s why a Pot for Pot specially formulates their Superb Soil to contain just the right amount of nutrients to maximize cannabis growth.  With a Pot for Pot kits, there’s no need to add additional fertilizer because their soil has everything your autoflower plant needs from seed to harvest.


👉Related: Best Hydroponic Nutrients for Weed


cannabis ventilation system


Marijuana plants require carbon dioxide to grow well. Luckily, this is plentiful in the air around us. You therefore only need to provide adequate ventilation for your plants to get as much CO2 as they need. 


What if your plants don’t have enough? You can add more, however, be careful when adding CO2 to your marijuana plants, because high amounts of carbon dioxide in an enclosed space poses health risks to humans or animals. Your plants will love the additional CO2, but you will not. 


Airflow is another thing to keep in mind. Without sufficient airflow, the oxygen generated by your plants will linger around, and carbon dioxide will be insufficient. Airflow also limits negative effects from happening to your plants, such as mold, pests, and diseases. Proper airflow limits the chance that these things will affect your plants. Ventilation also helps to maintain optimal temperature in your grow space. Extremely hot conditions could result in over-nutrition since the plants will take up a lot of water (and by extension, nutrients) and nutrient burn will result in a poorly ventilated cultivation area.


As you can see, ventilation isn’t just nice to have, it is essential to the health and productivity of your marijuana plants.


👉Related: The Growth Of A Cannabis Plant


Water or Moisture

As a general rule, marijuana plants “dislike” a soggy environment. For people growing cannabis in soil, this means that a soil mix that drains quickly is preferable to one that holds water.  That’s why a Pot for Pot kits use air pruning fabric pots, as they allow moisture to drain and roots to breathe.


In the weeks when vegetative growth is at its peak, plenty of moisture is required since a lot of evapotranspiration takes place. When flowering is underway, vegetative growth eventually stops, and the need for moisture or water reduces. At this time, cutting back on how much water you provide can be beneficial to the total yield that you obtain from each plant.


In fact, water also affects the quality or potency of the buds harvested because too much water causes some of the cannabinoids (especially THC) to be lost during transpiration. If you want the highest yields, you need to pay attention to your watering habits. Learn how much water is needed by your plants at the different stages of their growth and stick to that for the biggest yield possible.

Advanced Growing Techniques

There are many advanced techniques that you can try to increase the yield of your plants. A popular one is scrogging. This technique can dramatically improve the yield in indoor gardens.  The scrogging method involves placing a net or screen just above your marijuana plants. As soon as a branch grows over that net by four inches, bend that branch onto the net and tie it so that it grows sideways instead of vertically.


This training will eventually form a level, green canopy that will yield firm and juicy buds. This growing ‘hack’ works because all parts of the plants will be getting exactly the same amount of light.


Scrogging is an advanced technique because it places stress on marijuana plants. It’s a good idea to grow a few plants successfully before attempting this method. 

As you can see, trying to answer the question of “how much marijuana does one plant produce” is nearly pointless without taking into consideration some of the many variables that occur during the growing process.  


However, with some basic standards, a good foundation (by using a Pot for Pot), and perhaps an online calculator to give you a ballpark number of what you could harvest (based on your experience level, preferred grow medium, and setup), you can do some planning. Just remember, the answer you get will not be accurate. There are still critical factors to your success, such as the seeds that you choose. 


Growing anything is both art and science. That’s part of the fun. If you are planning to grow marijuana and are hesitant because you need to know how much you’ll yield, the best advice is to get started and find out. 


FAQ to How Much Cannabis Does One Plant Produce

Do marijuana plants produce a higher yield indoors or outdoors?
On average, marijuana plants produce a slightly higher yield when grown outdoors compared to being grown indoors.


What are the conditions for growing Cannabis Indoors?
There are several environmental conditions that must be kept optimum for maximum Cannabis yield. These conditions include optimum lighting, ideal temperature (72-78°F), relative humidity (45-55%), sufficient nutrients, adequate ventilation, sufficient moisture and the right growth medium i.e. hydroponics.


What are some things I can do to increase the yield of my plants?
There are several advanced techniques you can undertake to increase the yield of your plant. One such advanced technique is scrogging-a technique that involves placing a net/screen just above the marijuana plants so that they can form a canopy and increase yield.

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