9 replies and none of them give a straight answer! Come on you guys this is sad! These types of forums are to spread the words of knowledge, not for cracking pointless jokes, giving half answers and them sending somebody on there own to search for an answer. Anyway,

It depends on alot of factors, you will need fresh air exchange. So in/out fans are required most of the time. It depends on the size of your growspace and the size/type of your growlight! Remember that genetics in your seeds will make a difference too.

Your Answer::thumbsup:

A 4foot x 4foot grow area powered with a 400 watt metal halide light for veg and a 400 watt high pressure sodium light will fit 16 reg plants. Assuming the grow goes well, you should estimate to harvest 2-4 ozs (56-112 grams) per plant - at approx. 120 days after starting your plants!

This includes:
30 day seedling stage
30 day veg stage
60 day flowering stage

If you do not want to wait that long to harvest you can skip the veg stage and put them into flowering right after the seedling stage. But this will reduce your final harvest weight by alot!

Another option is to order a pack of Autoflowering seeds wich will finish 60 days after seed no matter the light cycle being 18on/6off.

Our parents used to call them 60 day wonders!!!!!! You can estimate around 1oz per plant when growing these. The harvest is smaller but you can fit approx. 50 plants in a 4x4 grow area. Here are a couple strains that are autoflowering:

Lowryder
Lowryder 2
Snowryder
Short Stuff

Due some research, you will find many others. Dopeseeds.com is a great company! I recommend them to anyone!

Hope this helps bro!imp: