First, a small mathematical correction -- a space that is 12 inches (1 foot) by 24 inches (2 feet) is 2 square feet, not 3.

At the ratio of 50 watts per square foot, you would only need 100 watts equivalent for the whole box, so if you went with 2 of the 23 watt CFLs, you would have PLENTY of light (200 Watts equivalent).

Make sure the inside of your grow box is white or a light color for reflectivity all around.

If you grow from seed at 12/12 from the beginning, it will probably retard the plants (not in a good way) and they wonâ??t grow right.

If you are growing from seed, the plants need to have at least 6-weeks after producing the first set of 3-way leaves before you can place them into flowering. They must have enough time to develop strong roots and stalks before they start flowering or they wonâ??t flower properly. You can keep topping them to control size.

For the first six weeks, I suggest 18/6 or 20/4 for lights.

Because of your space limits, when you switch to flowering, you want to trim off most of your side branches, leaving only one or two branches so all the flowering will be concentrated on those two branches.

When you put the plant into flowering, cut the height back to half the size you want it to finish at. If you want it to finish at two feet tall, cut it back to one foot tall when you put it flowering.

To grow like youâ??re talking, you need to grow and flower a pure indica, preferably a ruderalis or auto-flowering strain. The genetics of these cause them to grow short and have a short flowering period, so the plant shouldnâ??t out-grow the box.

Some pure indicas are:

L.A. Confidential
Hash Plant
Grand Daddy Purple

There are others you can find, as well.

Hope this helps. Good luck with your grow.

We have a book called Professor Grow's Book of Strains that lists the top 50 strains most commonly found in dispensaries, with the average THC content, how easy or hard it is to grow, Flowering Time, Awards won, and ailments that each strain has been used for in the past, etc.

We are in Colorado and will soon be offering grow classes. Check out ProfessorGrow.com for future announcements.


Professor Grow
ProfessorGrow Reviewed by ProfessorGrow on . Light Strip? rack? help me figure it out! :D Hello guys, im building a pc grow box, and for the lights im planning 4 100w 1100lumens CFLS softwhites, now the thing is that i have very limited space ( atx tower not full tower) and i was thinking in aligning the lights in some sort of power strip but this takes more room than actually needed, now, ive seen in sears and walmart arround xmas time a power strip the add where you can test your xmas lights, this thing is like 1 inch wide 1/2 inch thick and length varies, its like some kind of Rating: 5