How much weed can you grow indoors on 1m²?

How much weed can you grow indoors on 1m²?
Steven Voser

A multitude of factors influence how much weed you can grow in a standard indoor grow environment. Click here for some ballpark estimates.

Let’s be honest; most cannabis users, both recreational and medical, have toyed with the idea of growing their own weed.

Whether it's the money or a passion for the cannabis plant that motivates you, chances are you’ll want to have a general idea of how much weed you can produce from a standard indoor grow space before diving head first into the grow game.

Roughly? Anywhere between 0 and 700g/m².

Unfortunately, a more precise answer to this question isn’t that simple. The amount of cannabis you're able to produce indoors depends on a wide variety of factors, including:

  • the genetics of your plants
  • the quality of your equipment
  • the nutrients and grow medium you choose to use
  • the actual space you plan to grow in
  • your skills as a grower.

Obviously there are all kinds of facts out there. Some growers claim they’re able to produce 400 grams off a single plant using some kind of special grow technique, while others find their harvest hardly topped 1 ounce.

A general ballpark figure to aim for however, is this: as a beginner grower working with good genetics and good equipment, you can expect to produce roughly 0.5 grams or a bit more for every 1 watt of light you’re working with.

So, if you’ve got a 1m² grow space running off a 400 watt HPS light, expect to produce roughly 200 grams of weed as a beginner. Anything above that is a bonus. If you’re using a 600 watt lamp, that figure jumps up to 300 grams. If you’re using a 250 watt lamp, that figure jumps down to 125 grams.

If you're harvests are sitting below 0.5 grams/watt, you'll want to do a bit of extra research before starting your next grow. If you're getting harvests of close to 0.75 grams/watt, you can give yourself a well-deserved tap on the back.

Finally, if you manage to reach the 1 gram/watt mark or even more, you're officially ready to start teaching others how to grow.

Remember that this is a general figure. You may notice that your results are slightly above or below this, and this could be due to any number of reasons. However, 0.5 grams per 1 watt of lighting is a perfectly acceptable harvest for any beginner grower.

And while you're at it, why don't you show your progress by uploading your own grow reports?

Steven Voser
Steven Voser

Steven is a long-time veteran of cannabis journalism, having delved into every aspect of the subject. His particular interests lie in cannabis culture, the emerging science of cannabis, and how it is shaping the legal landscape across the globe.