how much weed can one plant produce

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 Can One Plant Produce?

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I’ve seen an outdoor plants produce as little as 1/2 oz up to a pound. There are too many factors to give you the answer you’re looking for. A decent grow could give you a few ounces per plant.

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How much will I yield?
“I have XXX watts. how much will I yield?” or “How can I get bigger yields?”

A common inquiry. From ambitious new gardeners and for good reason too. But, this is really a loaded question that doesn’t have a definite answer. It seems one of the first assumptions by new gardeners is that loads of light automatically equals loads of buds. Unfortunately, it’s just not that simple. Yield is equally contingent on a number of factors; light, temperature, humidity, water, nutrients, CO2/ventilation, genetics, etc. Think of it as an engine, with each factor of cultivation representing a single piston, sure the engine will run if some of the cylinders are misfiring or not firing at all, but to yield the most power from that engine, all cylinders must be firing in sync and at maximum capacity.

Temperature. Most cannabis plants will slow or cease growth when temp’s get above 85F, or below 65f. Optimal lights-on temp for most strains is about 72-78F, with 5-10 degrees cooler during the dark period being a good rule of thumb.

Humidity. Cannabis does best around 45%-55% RH (relative humidity).
During veg and late flower, however letting it drop lower during the final two weeks of flower is advised, as it will help prevent mould problems.

Water/moisture. Cannabis generally doesn’t like “wet feet”, or a soggy environment, so it’s very important to have a fast draining soil/soil-less mix (or well aerated solution in a hydro garden). Wet or damp conditions can also lead to mould problems during flowering.

Nutrients. Cannabis will require a variety of nutrients at varying NPK ratios during its existence. NPK stand for; nitrogen (N), phosphorus (P), and potassium (K)-the three major nutrients used by plants. Simply put, your plants will need a fertilizer with more N than P and K during vegetative growth and fertilizer with more P than N and K during flowering. Using any well-known quality fertilizer applied per instruction @ ½ strength is a good place to start. Organic, chemical, or somewhere in-between is another choice to be made and is a totally personal one. There is a plethora of fertilizers on the market, but the best fertilizer is the one that’s used properly.

CO2/ventilation. Plants require CO2. There is sufficient CO2 in our atmosphere to support massive bud growth, but when growing inside you must either have adequate ventilation (the volume of the room exhausted at least once/5 minutes) to ensure that there is a constant supply of fresh, CO2 enriched air or one must have supplemental CO2, which requires higher temp’s and more nutrients to be utilized effectively.

Light. Typically, the more the merrier, but more light will create stronger water, nutrient, and CO2 demands on the plants. You must also have the proper spectrum of lighting as well as a means of efficiently reflecting as much of the light as possible into the garden’s canopy. The norm is to use more bluish light (Metal Halide, cool-white fluorescents) for vegetative growth and more reddish (High Pressure sodium, warm fluoro’s) light for flowering. Though it’s possible to grow great buds under fluorescent lighting and a few will even argue their superiority to HID’s, most indoor growers use High Intensity Discharge lights such as MH and HPS, and many use fluoro’s for vegetative growth and HPS for flowering. It’s very important to have the light as physically close to the canopy as possible without burning the foliage and still allowing for even coverage.Many new growers believe that “Droppin the light” closer to the plant will be beneficial. Besides heat stress, the bulb puts out radiant energy that causes leaf burn (Note it is possible to complete a grow using just HPS or MH)

Genetics. Its an easily overlooked factor. Some strains simply have the potential to yield more than others. Having a heavy-yielding strain doesn’t automatically equal big yields, either. It only means that the potential for heavy yields is there. The grower must provide the optimum environment for that particular strain in order for it to be able to reach it’s yield potential, and each strain has slightly unique requirements. Also, within a strain there are usually several phenotypes, each of which will exhibit unique characteristics which is to say that some pheno’s of a particular strain will weigh more than others.

Plant/root/container size. Obviously, the longer a plant is veg’d, the bigger it will get and the more it will yield. Almost always overlooked because they’re unseen are the roots. Root mass is directly related to bud production. Simply put, the more roots you have the more bud you will (potentially) have. Be sure to always allow plenty of space for the roots to grow and spread out, even more-so in soil A general rule of thumb is 1 gallon of soil for every foot of plant height.

Scrog/Sog/Vertical gardens
These systems have a higher g/w/time yield than comparable large plant system over the same time period.

Grower’s skill. Growers can add yield by: using additives (like B1, kelp, enzymes), foliar feeding, and topping/FIM/

In addition. Tricks like keeping nutrients and the air temps warm during night cycle can help final yield. Although it’s a topic of hot debate, it’s generally thought that any system that supplies the roots with maximum oxygen (aeroponics) would outperform a system that restricts 02 input such as (soil).
So, as you can see there’s much more to yield than throwing some plants under tons of light with tons of nutes. Before one becomes too concerned with yield, one must first learn how to grow plants well, learn how to “listen” to the plants and give them just what they need. It’s best to start with simpler methods, in fact, I think the simpler method is always the better one. Learn how to grow strong, healthy, fast-growing plants and the yields will come.

im growing a outdoor plant( just one). how much weed could one decently grown marijuana plant produce. my friend told me like an ounce or two but i thought…