Over the last year of growing, one of the questions I have asked myself multiple times is how many marijuana plants fit in a a 4×4 grow tent.
Back before I started my first grow, I searched to answer the question like any new grower would, and really I did not find a definitive answer. 1 plant per square foot was the most common answer I came across. This is the rule of thumb I went in with, not knowing any better.
As you may recall, with my first grow I started with 12 plants. Between 2 grow tents, 6 plants per tent. The legal maximum marijuana plants for a personal use recreational home grower in Michigan.
With the first grow, complete inexperience kept my attention focused on the myriad of problems I encountered. I minimally recognized that 6 plants per tent was probably too many.
I recalled the need to reduce the plants per tent enough from the first grow, that on the second grow, I tried a few different combinations to get a better understanding of how many marijuana plants can fit in a a 4×4 grow tent.
What I discovered on the second grow is that it is not really how many marijuana plants can fit in a 4×4 grow tent, but how many can fit while being an optimal grow environment. Particularly during bloom .
At the end of my second grow what I came to understand is that due to a variety of factors, I am of the opinion that the optimal amount of plants to fit in a 4×4 grow tent (during bloom) is 1 plant.
Thats right, 1 plant per tent.
It is a hard pill to swallow, at least for me. I think just about every recreational marijuana grower in Michigan has dreams of growing the maximum 12 marijuana plants allowed and reaping the bounty of the passion for legal marijuana growing.
You can grow the maximum 12 plants if you want. It’s going to take 12 or so grow tent setups if you want to get the most productivity from those 12 plants.
In my direct experience, like it or not, 1 plant to a 4×4 grow tent is the way to go.
Let me show you why.
trap I fell into repeatedly and I think other new growers who are excited to start growing may encounter as well, is that when you start with small plants, be it seedlings or young clones, the tent looks very spacious. Plenty of room! The new plants are so small and unassuming it is hard to imagine just how big they will get.
Well let me tell you, the plants are going to get big.
Big enough for a single plant to fill the space of a 4×4 grow tent. Let me say it again to be absolutely clear. One plant is going to grow large enough to fill the entire space of a 4×4 grow tent!
What happens when there is more than 1 plant per tent is that the plants start to crowd each other. They start to compete for the light and get crowded. To the point that it is less productive to have multiple plants in a single tent than it is to have just one plant.
One thing I did not know going in about using a grow tent is that when a tent is properly vented, that creates negative pressure.
The sides of the tent will “suck in some” due to this.
With the sides of the tent curving inwards from negative pressure, I would estimate that roughly 4 to 6 inches on each side of the tent is lost. For the easy calculation lets go with 6 inches on each side . This means that the 4×4 grow tent really only has about a 3×3 usable grow area.
In my experience so far, a lone plant will fill up this space on its own.
With the second grow, in one of my tents, I went with 4 plants. Let me tell you, as it gets close to harvest it is an absolute jungle in that tent. In another tent, I went with just one plant.
The singular plant is doing so much better on bud size. Minimal “popcorn” buds compared to the plants in the too crowded tent.
Beyond the main point of minimizing the competition between multiple plants that produce less and a single plant that produces more, it is much easier to care for a single plant. It takes less water and nutrients, plus there is better air flow.
I work towards getting the most productivity out of each tent that I have. Based on my experience so far, it is best to go to bloom with just 1 plant per 4×4 tent.
From what I have witnessed so far, it is better to have one very productive plant per tent rather than having multiple less productive plants crowded in a tent.