How many plants...

[Weedologist]

It may have been asked and I just cant find the answer, but how many plants can one finish under a 400w HPS. The grow space would be 3x3.5 ft. And could I use SOG in this small space? What about height, when should they be forced to flower? Im losing my mind here... :i feel stupid:

Weedologist Reviewed by Weedologist on 09-02-2010. How many plants... It may have been asked and I just cant find the answer, but how many plants can one finish under a 400w HPS. The grow space would be 3x3.5 ft. And could I use SOG in this small space? What about height, when should they be forced to flower? Im losing my mind here... :i feel stupid: Rating: 5

[bobjob4u]

well to start whatever the size when you start flower. It will be double that at harvest. So if you have 3 feet of height then flower your plant when it is around a foot and a half tall. maybe 4 plants i am ambicous so i would try 6.:thumbsup: depend what strain and such.

[Prodaytrader]

ur in luck...I just finished battling something similar to this. Check out my sig and take a look at my photo album. You will see that my space isnt much different then yours and I too have a head room restriction of about 3.5 feet. The problem will be with you being greedy just like I was. About 4 plants would be all that I would recogmend. If you crowd out the space the plants will become over grown and your issue will be light penetration. If you crowd the space the plants will fill in the light space and then begin to compete for light. Stretching occurs and if you dont prune or thin then you get too much vegetation not getting light lower down on the plant. Bottom line, make sure you have about 24" off center from the center of the pots spacing. Even that may not be sufficient.

[Weedologist]

Im not really restricted on height, ceiling is 8ft, its a 4x11x8 closet. But I dont think I can grow them that tall because of canopy penetration correct? Its only a 400w... Lol, Im greedy too

[jtsik330]

I would do something like 6 plants since a 400 watt HPS doesn't have very much light penetration I would trim lower branches to get to get the upper buds as much energy as possible. I use to two 400's in my tent and I trim a good amount off the lower portion of the plants. If your growing in soil I would go into flower no earlier then a month. Now that I'm using hydro I can flower at about a month and use a good amount of bushmaster to keepem tamed. 6 is def your number though for how many.:thumbsup: If doing SOG.

[Dutch Pimp]

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

[GROWxMOREx420]

I grow ten clones a season in a 3 x 3 1/2 closet under a 600w HPS. With that being said, I would grow 6-8 plants under a 400w depending on the size and strain of them. I usually Veg until they are 12" inches tall and well rooted, that way by the end of the cycle they finish at about 3ft tall, yielding roughly 1oz a plant.

[Salvein211]

I too was using a 400w HPS to flower 7 ladies and it's not sufficient, so I changed to a 1000w. I would say 6 is the absolute max you'd want to try.. And by doing 6, you would only want to veg until plants are 12" in height. . . Even if you LST, shoots will grow and overwhelm your space horizontally. More so for me because I have white widow... (big plant) lolz

[Weedologist]

So if I had 3 strains going at the same time, lets say Northern Lights, Super Silver Haze, and Aurora Indica... HYPOTHETICALLY!! That would be too much for a 400w bulb to handle? I'm starting to get sad here.

[Delta]

No , it would'nt be too much to handle. Just do 2 of each strain for a total of six

and you will be fine.