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How much weed does one plant yield

The question most asked by beginner growers is how many grams of cannabis per plant can be harvested? A great question, yet hard to answer in a simple way, but certainly not impossible.

All plants depend on light, nutrients and water to achieve their optimal growth and potential in terms of harvest. Cannabis plants can be grown indoors or outdoors using many different horticultural methods, which all have an impact on growth, not even taking into consideration the natural variations in yield between strains.

To answer the question “how much weed does one plant yield“, we will look at weed plants grown indoors under different light conditions to give you an understanding of how much weed an average weed plant can produce.

Factors that determine the harvest of a strain

Many factors influence the weed production of a cannabis plant. The most important ones are listed below:

  • The type of culture: indoors or outdoors
  • Lighting power
  • Available space to the plant
  • Growth time
  • Temperature and humidity
  • Type of seeds
  • Fertilisers used to feed the plant
  • The culture technique used: one-bud, scrog, trellising, etc.

Indoor cultivation

The number of plants doesn’t really count. It doesn’t matter how many plants per square metre you grow. The goal is for the entire available surface to be covered by plants, which will allow the flowers to occupy all of the available space and thus maximise the production of weed.

The number of plants per square metre will, however, have a significant influence on the growth time required.

You could decide to make 1 m2 of one-bud. In which case, you would need between 15 and 50 plants to cover one square metre, and in this scenario, the growth phase will last less than a week. Indeed, you can put your plants in the flowering period as soon as the first leaves appear. Or you could decide only to grow one plant in one square metre. For this, and if you want your plant to occupy all the available space, it will take a growth period of two to three months. However, it is advisable to choose a compromise between these two extremes.

For beginners, six plants per square metre allow a relatively short growth phase of 4 or 5 weeks. This also avoids having to manage 10 or 15 plants in a first session.

Here are some different scenarios to give you an idea of what you can hope to harvest.

Scenario 1 – Beginner using 600-watts

A beginner cultivator using a 600-watt HPS lamp in a 1 m2 box. Average quality equipment and basic fertilisers.

Let’s also imagine that this cultivator takes care of his plants carefully throughout the growing period.

Finally, let’s also suppose that this grower encountered some problems of too high temperatures or too low humidity.

This cultivator can expect a harvest of 200 to 350 grams per square metre.

Scenario 2 – Experienced cultivator using 600-watts

Imagine an experienced cultivator who knows some cultivation techniques such as trellising or scrog.

Under the same conditions as the first scenario. 600-watts in 1 m2, medium equipment, basic fertilisers. Everything goes well during cultivation, and the plants receive the care they need.

This cultivator can harvest between 300 and 500 grams per square metre.

Scenario 3 – Beginner cultivator in 40-watts

A beginner cultivator using a 400-watt lamp. High-end equipment with a lot of cutting-edge optimisations and advanced but poorly mastered cultivation techniques.

In such a scenario, it is quite likely that the grower will make beginner mistakes. And these errors will cost much more than the potential gains that these optimisations could have delivered.

The harvest could also be limited to 50 or 100 grams of dry grass per square metre if something goes wrong during the cultivation.

On the contrary, if all goes well, the grower can expect between 200 and 300 grams per square metre. But it will be necessary to avoid embarking on optimisations or advanced techniques.

Scenario 4 – An experienced cultivator using 1000-watts

Finally, imagine a very experienced cultivator with a 1000-watt lamp and a growing area of 1.5 to 2 square metres. Top-quality material, ideal climatic conditions and culture which goes as well as possible without any problem. The grower will use advanced cultivation techniques such as CO2 enrichment, hydroponics and automated climate management.

This last cultivator could reach a record harvest of more than 650 grams per square metre.

How many grams of cannabis per plant can you harvest?

As promised at the beginning of the article, here are some crop estimates per plant, based on different growing conditions.

These estimates are presented in the form of scenarios, as in the previous section

Scenario 1: 400-watts and 15 days of growth

Imagine a plant grown indoors with a 400-watt lamp and a growth phase of only 15 days. The cultivation space is 1 square metre, and the plants occupy all the available space during the flowering stage.

A short growing period shortens the total growing time. For a variety that flowers in 50 days, a growth of 15 days will allow harvesting in just 65 days or just over two months. The downside is that you will need many plants to fill a space of one square metre!

In this configuration, if the grower takes care of the plants properly and there are no major incidents during cultivation, a cannabis plant can produce between 15 and 30 grams of cannabis per plant.

Scenario 2: 400-watts and 40 days of growth

Let’s take an indoor plant again with a 400-watt lamp but now with a 40-day growth phase.

During these 40 days of growth, the plant will have had time to develop a very dense root and leaf network, especially if the weather conditions are good. Some varieties will quickly reach a metre in height in 40 days of growth.

The production of buds from a single plant will, therefore, be much higher than the previous scenario. You can expect between 40 and 80 grams of cannabis per plant if flowering takes place under optimal conditions.

Scenario 3: 600-watts and 30 days of growth indoors

Growing a plant with a 600-watt HPS lamp with a 30 day growing period

The 600 watts will simply give you explosive growth. Indeed, you can virtually see your plant growth with the naked eye between morning and evening.

You will have the opportunity to train your plant to give it the shape you want and to maximise the occupancy of the space. With this method, yields can reach up to 100 – 120 grams per plant.

Choose the right seeds and your growing method

There are enormous variations in terms of potential harvest per plant ranging from 500 grams and 3 pounds.

This is a complex topic and there are many other factors that can affect yields, such as hydroponics, which minimises the likelihood of errors and the type of seed used, which also has an impact on the amount of harvest. Some strains are much more high-yielding than others. Big Bud and Girl Scout Cookies, for example, are famous for their huge buds and generous yields.

Reading tip: check all our high yielding strain seeds

The average yield over a cannabis strain depends on various factors. But how much weed does one plant yield? Check it out!

How Much Weed Does One Plant Produce?

There are two main goals for every cannabis grower. Obviously, they need to grow quality plants. However, they also need to grow large in terms of weight. But how much weed does one plant produce? That’s something of a loaded question. In fact, there are numerous variables that can affect how much weed a grower can harvest per plant.

Cannabis Yield: What’s On The Scale?

There’s no general rule on how much any given marijuana plant can yield. The amount of weed that an indoor grower in a Colorado warehouse gets per plant will never be the same as an outdoor grower in the northern California sun. In fact, these growers can even grow the exact same strains of marijuana and see completely different results in how much weed they get per plant. Several factors can affect plant yields – and not all of them are positive. However, if you can identify these factors, it can lead to a better understanding of how they affect the total weight of a marijuana plant. Seasoned growers know how to use these variables to grow massive buds.

High Yielding Strains

Factors Impacting Yields: The Break-Down

If a grower doesn’t maintain steady control of some of the most crucial variables in growing cannabis, they’re going to have a difficult time maintaining high-yielding harvests. If your harvests don’t bear enough weight, you may actually end up losing money paying for expenses like lighting, nutrients and growing tools that you might have used incorrectly.

Growing Indoors Vs. Outdoors

One of the first questions every grower asks themselves is whether they want to grow indoors or outdoors. There are several advantages to each technique.

When a grower cultivates indoors, they can control factors like ambient temperature and humidity more easily. With control over these kinds of variables, it’s easy for an indoor grower to significantly increase the weight of their plants.

In contrast, growing outdoors allows a grower to utilize the power of the sun. This can have a significant impact on a harvest’s yield. However, outdoor grows are vulnerable to factors like changes in weather, swings in temperature, precipitation and pest infestations. These can seriously impact cannabis yield in a negative way.

Growing Medium

The growing medium can also change how much weed one plant will produce. There are two main types of growing media: soil and hydroponic. Growing in soil is fairly self-explanatory – each plant grows in dirt. With hydroponics, the plants are set into a water-based growing medium. Each technique has its own factors to consider:

  • Soil
    • Easier – plant take root in soil, which buffers them against possible issues.
    • Lower yields compared to hydroponic setups.
  • Hydroponics
    • Less forgiving than growing in soil – there’s no room for errors. Susceptible to issues in temperature, pH and TDS.
    • Higher yields – hydroponic grows can increase yields by up to 20%.

Correct Nutrients

One of the more obvious ways to affect how much you can get from one plant is by using nutrients. There are three main macronutrients that every cannabis plant requires: nitrogen, phosphorus and potassium.

Nitrogen is one of the basic building blocks of all plants. It’s important in the early stages of a plant’s lifecycle and causes its stems to stretch. Potassium and phosphorus are both important to late-stage plants. These determine how many flowers your plant grows and their size, weight and density. Understanding how these nutrients affect a plant’s growth is essential for any cannabis grower.

Effective Lighting

Lighting is a crucial factor that can have huge implications on a plant’s weight. Factors like the wattage and type of light can make the exact same plants grow in vastly different ways.

Using different lights can affect a grow’s yield. For example, LEDs, one of the most popular types of lights, yield about 0.5 grams (.017 ounces) per watt of power. In contrast, high-pressure sodium (HPS) lights, the industry standard for professional growers, can produce about one gram per watt. Therefore, under perfect conditions, an experienced grower can expect a 1000-watt HPS light to yield about 1000 grams (35 ounces). However, if you can’t afford a huge, expensive light, don’t worry – you don’t always need a massive HPS light to get a decent yield!

Number Of Plants

When a grower is trying to maximize their yield, more plants isn’t necessarily better. That might seem counter-intuitive at first. However, growing too many plants in a tight space can result in decreased ventilation, less light penetration through the canopy and increased humidity. In turn, these issues can lead to several problems that can decrease yields. For example, higher humidity encourages the growth of harmful pests, diseases and fungi that can cripple a grow’s yield. For this reason, growing 4 plants under a 600-watt HPS light can at times yield more than 16 plants under the same light.

Well-Chosen Genetics

A plant’s strain will also have a huge effect on its overall weight. While there are countless individual cannabis strains, there are few different over-arching categories these strains all fall into. They include:

  • Photoperiodic strains – these types of plants generally grow taller and yield more but require a grower to change their total daily hours of light from 18 to 12 in order to make them flower. This change mirrors the natural difference between daylight hours in summer and fall.
  • Autoflowers – these strains don’t require a change in light cycle. They generally grow faster than photoperiodic strains but have lower yields. They allow for more harvests in less time.

Additionally, every strain of cannabis falls into one of two main breeds: Indica and Sativa. Generally, Indica plants grow shorter and yield less than Sativas do. Sativas usually grow to be significantly taller and produce higher yields but take more time to complete their grow cycle.

Climate Control

One of the most often overlooked variables determining how much weed a plant can yield is a garden’s ventilation, ambient temperature and humidity. First, temperature and humidity can encourage a plant to grow taller and bigger. This, in turn, will have positive effect on yield. Additionally, every individual strain of cannabis has a temperature and humidity that it prefers. If a grower can dial in their garden’s conditions to best suit the strains they’re growing, they can encourage their plants to increase their yield.

Grower’s Skills

A grower’s personal skills will also play a huge part in their grow’s total yield. A skilled grower with significant experience will be able to identify problems before they threaten their garden. Several issues, like pest infestations and nutrient deficiencies, can have a negative effect on a garden’s health and yield. This is one of the most difficult factors to affect when a grower is trying to maximize their yield. The only real way for a grower to improve their skills is through time, dedication and practice.

The Most Effective Training Techniques

There are a variety of training techniques, both advanced and beginner-friendly, that can be applied to cannabis plants in order to increase the payoff and bring the total yield as close as possible to the maximum. Dedicating time to research and perform LST (Low-Stress Training) and HST (High-Stress Training) can be a grower’s most profitable investment. These methods ensure reshaping the canopy of the plant in order to achieve an even distribution of light and multiplied bud production. Several other techniques like ScrOG, SoG and defoliation can also have a hugely positive impact on a garden’s total output.

This chart compares information reported by several growers using different environments and techniques to grow the same strains. Note how different variables can affect yields.

Wet And Dry Weed. What’s The Deal?

Even after you cut down your cannabis plants, you can still affect your yield. The way a grower dries and cures their weed can be just as important as the actual growing techniques they use. When a grower dries their weed, strict climate control is required. They need to do it slowly in a room with no lights and a temperature of 18 C (64 F). If the grower has their drying and curing techniques dialed in, their dry weight will be a mere 20 to 25% of their wet weight.

Are Maximum Yields Achievable?

If a grower has their entire grow dialed in and maximized for production, they can expect their cannabis plants to produce about one gram per watt of light. To achieve this kind of precision, many growers keep a daily journal or log to measure all of the above-mentioned factors. This important task is often forgotten, but crucial in any grow. Without a journal, a grower is essentially doing guesswork, whereas a systematic approach allows the grower to achieve maximum yield, as well as being a great way to improve experience and gather long-term knowledge.

There’s no easy way to know how much bud you’ll get from one plant. All of these variables can have huge and wide-ranging effects on your plants. However, if you learn how to control factors like growing medium, nutrients, lighting, number of plants, genetics, conditions and training techniques, you can maximize your yield effectively. Moreover, by keeping a good diary and recognizing how these factors affect your total yield, you can quickly and easily learn which variables are the most important. Don’t worry – with diligent work and practice, you too can be on your way to a gram per watt in no time!

How much yield can you get from one marijuana plant. Know more about factors that can affect how much weed a grower can harvest per plant