how many plants

[mattas]

hey,
how many plants could i grow in a space of
2.5foot x 3.5 foot x 4 foot tall growing with a 400w hps

[Dutch Pimp]

4 foot of total height?...that's gonna be a problem. You need 7-8 feet. IMO.

Bottomline: you need to keep a 400 watt HPS at least 12-15 inches from the top of the plants. Even more during the veg cycle.

[LuciferN]

4 foot of total height?...that's gonna be a problem. You need 7-8 feet. IMO.

Bottomline: you need to keep a 400 watt HPS at least 12-15 inches from the top of the plants. Even more during the veg cycle.

That true, you need to keep space from the top of the plants and the light, you have to think about the containers you're going to use, 5 gallon containers are quite tall. Plus the plant may be growing a lot, all depends on the veg. time and they will stretch in the first 3 weeks of flowering. This is all some little things you have to consider before you make this setup. If you get some place with more height you could make a nice 6 plants there !

[Dutch Pimp]

I agree. 6 is about the max for a 400 watt HID light.

[Forwhat420]

And with those six if you veg them for any length of time and have all females, you are gonna run out of room!!

[Dutch Pimp]

And with those six if you veg them for any length of time and have all females, you are gonna run out of room!!

I agree with that too. I did 7 females under a 400 watt HPS once. It's a PITA, rotating plants everyday under the light.

[snowman121285]

I have 6 plants in a closet that is 8ft tall by 2 x 4. All the plants are close tohether and I have a 400w hps light. but the bottom leaves are dieing and the tops are fine. is the light just not getting through?

[detroitfish]

maybe could be nute lockout ,could be root bound or could be fine how about some pics and more info!