Please Help?????

I am doing 36 lil guys under 4 1000's HPS i am on day 13 of flowering. I feed them twice a week, I started with BCUZZ A and B, and 3D organics liq. comp. for Veg. and I vegged for like 5 weeks. When I switched to 12/12 I went to GH floramicro and florabloom and stayed with the liq. compost. I now am not only fighting spider mites, (soon to be eaten by ladybugs) but my plants have splotchy powder mildew or mold spots. They are also not showing alot of growth into flowering like they should. They are about 14-18 inches varying and are not very bushy and full leaves they are kinda thin but this could just be the strain. (not sure the strain, got the clones on a whim) I will post pics soon but camera is messed up. Any ideas? I keep my temp like 72-77 lights on and its like 59-62 in Dark. Humid. at like 38-46 varying. Please Help

Wow, 4 1000 HPS tells me you're not so new to the growing thing.

Spider mites can slow down flowering and overall growth BIG time. If you've got mites bad, ladybugs probably are not enough to fight the fight. Have you done a manual washing of each plant, especially spraying underneath the leaves? Since you're just on day 13 in 12/12 you might consider hitting the girls hard with some horticultural oil. Once they're actually flowering, oil won't be an option, so be aggressive while you can. Get your humidity up too (spider mites like it hot and dry, so keeping temp low and upping humidity slows down their repro cycle).

What's your set up / medium?

Good luck!

jJ

Yea I am jus goin lights and Soil on this round, I have heard good things and wanted to try it. I am using a Roots Organics mixture with 2 1/2 gall. pots. Any ideas about the powder mildew or mold its a first for me. Il get pics up soon.