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The leaves will probably stay yellow but that's of no real concern since you'll be cutting soon. I haven't really seen closeups of your leaves so I can' t really tell you what to do concerning your nutrients but it wouldn't hurt to start them lower and bring them up slowly. Now that you have...

Ok, if it's not your temps, its mostly likely your nutrients. How old are the nutrients? Have they been stored in your room with the heat and such? If so, you may want to replace them. In addition, try a flushing solution like clearex to pull out all of the salts that you've been feeding the...

The answer is no. You have a large window (a couple of weeks) in which to harvest after the required flowering time. Check your trichomes with a handheld microscope to determine when exactly.

From what I can tell by your pics, it appears you're not cooling your lights, am I correct? I believe your room temps are causing the droopiness in the leaves and for them to fall off. What are your room temps, ambient and directly at the leaf? Thanks.

Just a few pictures of my in progress, grow room project. I've been playing with the exhaust, CO2, air conditioning, light placement, ventilation, and fans to get everything just right. Another air conditioner may have to be added when the final 3 lights (2K in flower and 1K in veg) are turned...

Okay, I have a number of questions about ventilation, heat issues, and CO2 regulation related to a grow room that I'm constructing. First off, here are the stats: 20ft X 10ft X 7ft room (1400 cubic feet) in an insulated basement which has concrete walls and is sealed really well 1 window at...