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Marijuana Yields: A Growers Guide

How much Weed can I grow in one plant ?

by Neal Brown . Updated: October 13, 2021

How Much Marijuana Can I Yield Per Plant?

People choose to get into growing weed for all kinds of reasons. Some want to have a steady supply of medical marijuana to manage health conditions, while others grow high-THC strains for personal use or generating some extra income. No matter why you want to grow cannabis, you’ve probably been asking yourself: how much marijuana can I yield per plant?

Unfortunately, there’s no cut-and-dry answer to this question. To get an idea of what to expect, you’ll need to understand the many variables that go into determining yield. Whether you’re completely new to growing marijuana or you’re an experienced grower with a few seasons under your belt, you can find out everything there is to know about what to expect in different growing conditions and how you can maximize your yields below.

What Is the Maximum Yield for Indoor Plants?

The key to growing marijuana successfully indoors is to faithfully replicate the perfect outdoor growing environment. Creating the perfect indoor grow environment requires careful attention to your plants’ lighting, water, temperature, humidity, air quality, space, and nutrient needs, avoiding pests, and changing the plants over from veg to bud at just the right time.

If you get everything just right, you can expect your plants to produce around one gram of smokable marijuana for every one watt of light per plant in your grow room or tent. In other words, you can get around 400 grams from a setup with one 400-watt HPS light, while one 800-watt light could feasibly produce twice as much bud in the same amount of space.

Of course, there are also many other factors you’ll need to consider if you want to increase your yields when growing indoors. Growers who manage to pull down a gram per watt of marijuana usually have years of experience under their belts. They’ve already figured out the optimal soil or hydroponic setup and have devoted some time and practice to developing effective trimming and training techniques to maximize light exposure.

What Is the Average Yield for Indoor Grows?

If you’re still a novice to indoor growing, it’s unlikely that you’ll achieve maximum yields in your first season. You can improve your chances of pulling down plenty of pot by purchasing high-quality marijuana seeds from a reputable seed bank like Weed Seeds USA and following established light, watering, and feeding schedules. However, it will take some time to get to the point where you’re pulling down a full gram of bud for every watt of light.

In the meantime, you might want to aim for more realistic goals. The average indoor grower can expect to pull down between 1.5 and 2.0 ounces using a 200-watt CFL lamp as long as everything else about the grow runs smoothly. Growers who upgrade their lighting to 1,000-watt HPS lamps can expect a more impressive 9.0 to 18 ounces combined yield from all of their plants.

How to Maximize Light Use to Improve Yields

Just buying a more powerful grow light won’t necessarily be enough to bump up your yields. If you’ve got too many plants beneath the lamp, they’ll still be competing for limited resources and you might not come as close to meeting your goals. The plants in a more crowded setup won’t have proper airflow, which will make pests and diseases more likely to pass between them, and the leaves and colas close to the bottom won’t get as much light.

As a novice grower, your best solution is to cut back on the number of plants you have in your grow room. If you’ve already got the basics down pat, you could try learning some advanced trimming techniques like topping, fimming, or scrogging to get your plants to branch out more so they’ll have better light access. Some growers also lollipop plants grown in crowded conditions to improve airflow.