What Size Grow Tent for 2, 4, 8, 12 Plants (Complete Guide)

The size of the tent you choose is one of the most important decisions you’ll make. Together with your plant choices, it will inform your selection of supporting components and contribute to your overall operating costs.

If you choose an oversized tent, you run the risk of paying more for your basic equipment and for the energy necessary to power your lights, fans, carbon filter and other equipment.

If you choose an undersized tent, you risk creating a crowded and potentially unhealthy environment for your plants, or one that simply won’t accommodate mature plants, even after aggressive staking or trellising and pruning.

What Size Grow Tent for 2, 4, 6, 8, 12 Plants

Although the best authority on grow tent sizing is the tent manufacturer, these general guidelines will give you a broad idea of the number of plants you can maintain in some of the more popular tent sizes on the market:

  • 2 by 2 ft. Grow Tents – 1 to 2 mature plants or 4 small ones
  • 5 by 2.5 ft. Grow Tents – 2 mature plants or 6 small
  • 4 by 2 ft. Grow Tents –3 mature plants or 8 small ones
  • 4 by 4 ft. –4 mature plants or 16 small
  • 5 by 5 ft. – 6 mature plants or 20 small ones

So, Which of The Grow Tent Sizes is Ideal?

There are over a hundred indoor grow tent models to select from that come in varying sizes and capacities. It may be confusing at first, not knowing which grow tent size is for you.

However, the things you have to keep in mind are: how many plants you need and the space for housing the grow tent.

Hence, for a hobbyist cannabis grower, 4 by 2 inch grow tents and the Vivosun 4 by 4 grow tents are the most ideal sizes.

These sizes are also fitted with the most common grow lights ensuring optimal yield. The 4’x2’ grow tent size is often recommended for novel gardeners as it has enough space and good yield; several ounces a month.

Read More: 5 Best LED Grow Light for 4×2 Tent.

Moreover, all the plants in the back row get adequate light and you can access them with ease. With this grow tent, you can also upgrade your grow lights if those that come with it aren’t to your liking or taste.

A 4×4 grow tent is ideal for larger yields and more experienced growers. It also has the potential to support some of the largest grow lights out there, even a 600 to 1000W grow light so long as it’s 6 – 7i inches tall.

Read More: 10 Best Inexpensive LED Grow Light for 4×4 Tent

A grow tent of this magnitude is big enough for monster yields per month that the previous size, arguably by a pound or more, but it’s still relatively small enough to be managed by one person.

Is the Tent’s Height Important?

Yes, it is a crucial aspect of a grow tent, because it helps determine the height of your lighting, especially in terms of how to hang your lighting. The minimum height is 5 ft. but 7 ft. is the recommended best height.

Short spaces are difficult to grow cannabis in since you’ll constantly be worried about your plants reaching the grow lights.

Your grow tent should be at least 5 feet in height, to which it can support up to a 400W grow light, albeit more headroom makes it a little easier.

For instance, having a height of 7 feet tall, you’ll not be limited by the height of your growing space and moreover, you’ll install more heavy duty grow lights.

Not forgetting, a little extra height makes plants grow strong and also increases the yield as the plant is not limited by space.

You also need to remember that plants should be provided with a horizontal space to grow. For obvious reasons, that will occupy more space of the grow tent to facilitate the growth.

How Can You Control Grow Tent’s Height to Fit the Plants?

If you truly want to be able to fit 4 plants in a 4×4 grow tent, controlling your plant’s height will be crucial. Luckily, there are a few tricks to control your cannabis plant’s height.

Switch The Plants’ Flowering Stages 

During the vegetative growth phase, when your cannabis plant has reached half the height you ultimately want it to reach, change your lighting cycle from 18 hours to 12 hours.

The reasoning is your plant will still grow the other 50% during the flowering cycle. This has proven to be a good rule of thumb and will help you grow the right sized plants for your grow tent’s size.

Trim Your Plants

Cut off the top node upward from your plant’s main stem. Not only will this limit the height of the plant, it will diffuse hormones downward to the larger branches and help them produce more bud.

Do the LST (Low Stress Strain) on Your Plants

Early in the vegetative phase, you’ll want to bend your largest branches over to the side of the grow bucket and tie them down somehow.

The branches will naturally turn upwards again toward the light, but this method will decrease the ultimate height of your plants.

Basically, when you have a plant that’s 4 feet tall, the middle & lower bud sites don’t receive light as strong as the top, resulting in lower yields.

You can begin LST once your plant reaches 6-8 inches in height, or around weeks 2-3 of age.

Final Thoughts

With the above information, you’re now fully prepared to purchase the right size grow tent you want. I hope the grow tent you choose will fit the number of plants you desire.

In essence, the general guidelines on the number of plants per grow tent should work just fine.

However, you should remember that more space is better if you have the flexible budget to go one size up and provide your plants a little more breathing room. But in the end it’s totally up to you.

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