Feedback on ScrOG setup?

I'm hoping for some feedback about whether the soil:screen:light ratios make sense for this scrog setup, especially for a heavily sativa strain like this.

I've got this little Dinafem Super Silver girl vegging right now (pic taken a couple days ago):



I fimmed her about a week ago and I'll be taking a couple clones once those branches have grown out enough to be cut. Once she recovers from the clone-taking, I'm transplanting her into the final container and switching to 12/12. I've combined the soil container and screen for the scrog, using the holes already drilled around the top of my recycling bin (which amazingly were spaced perfectly for the screen I found in my shed):







The screen's surface is 22" x 16", which I plan to illuminate with about 200w of CFLs (2x 42w, 2x 32w, plus a few 23w to fill in the gaps). I used an entire 22qt bag of organic potting soil, mixed with a generous portion of perlite to improve drainage, and some dry organic fertilizer (Espoma Plant-tone) to reduce the amount of ferts I'll need to add later:



So basically here are my concerns:

(1) Is that too small a screen surface area for over a cubic foot of soil? Will she be outgrowing that screen too fast and then get too tall for my light setup?

(2) Will I have an air circulation/humidity problem under the canopy since it's walled in like that? I have an extra PC fan that I could install in one side of the recycling bin to allow air to flow through better, but I'd rather save that fan if it's not needed here.

(3) Is there anything else I'm missing?

Thanks in advance for any feedback! There are more details in my grow journal (see sig), if you're curious.

Sounds good. Careful not to over water. There are some drainage holes aren't there? Fan installed would be better.

cues said:

Sounds good. Careful not to over water. There are some drainage holes aren't there? Fan installed would be better.

Click to expand...

Yeah definitely will try to avoid overwatering. The bin came with 4 decent-sized drainage holes, but if those don't seem to do the trick I'll probably drill a few more.

Also, to clarify about the fan, I do have a box fan circulating air in the box and an exhaust fan removing air from the box. My air intake is an air conditioning duct, which pushes cold (and low-humidity air) into the box anytime the a/c is running. So there's plenty of air flow in the grow box, I just don't know if the canopy and recycling bin walls will contain too much moisture under the screen.

the leaves in the first pic seem to have the edges curled up... it seems a little too warm for it

Phatman said:

the leaves in the first pic seem to have the edges curled up... it seems a little too warm for it

Click to expand...

Yeah, she had some heat stress in the box last week before I turned on the central air, and before I put the box fan in there. Since then, though, the temperature ranges from 69°F (lights off) to 84°F (hottest time of the afternoon), but mostly hovers around 78-80°F.