my first grow box

Hey everyone! I haven't been on in quite sometime and had to give up growin last year after a my first plant turning into a male. This time i'm going to be using a grow box and want to keep it simple!

The dimensions are 3.5 ft x 2ft x 4 ft.
I'll be using a 400w hps
simple soil base
and if my measurements are correct i can comfortably fit 6 plants


because the area is so small, i was wondering if it was necessary to include ventilation in upon having a fan to oscillate the air. If so, how will the plants benifit.

as well, can i add any kinds of nutrients in while i switch over to the buddin cycle. i know that the plant needs more p & k during this stage.


thanks, gamogamo

The size of your box maybe a problem. A 400 watt hps is going to get that box really hot. Maybe a bigger box or a smaller bulb. I dont think a fan will do it.

do you thin two 100w hps would work fine?

what does adding the ventilation do?

i think they will work good. Venting will allow you to help control the temp in the box. just keep the vent high in the box. The hole heat rises thing.

i would still keep a iso fan in the box if possible, to keep the fresh air moving

My box is probably a little more complicated than you are looking for, but I'll tell you these boxes need ventilation to keep temps reasonable and plants just need fresh air. These are living things ya know?

There is link in my sig for a picture.

A 400w will be perfect if you use it with a cool tube. They're pretty cheap and easy to make, and they work very well.

DIY Cool tube:
https://www.rollitup.org/grow-room-design-setup/121080-diy-cool-tube-how.html
https://www.rollitup.org/view.php?pg=faq&cmd=article&id=565

Bake a round:
pyrex bake a round, Home Garden, Pottery Glass items on eBay.com

awesome, thanks for the help !

idk what'd i'd do with out you guys

alright now i feel real slow.
what does a cool tube do ? ?

gamogamo said:

alright now i feel real slow.
what does a cool tube do ? ?

Click to expand...

The glass traps the heat in it, and the fan removes the hot air before it can radiate via dryer ducting or PVC or something similar. It makes it easier to have HPS's when heat is an issue.