It doesn't look like bleaching/burning from the lights being too close to me.

I've heard of people running into wild calcium fluctuations from using distilled water, but I'm not entirely sure how this may vary with bottled water. While you wait for a more accurate diagnosis, it would be a good idea to at least get a liquid pH test kit and find out the pH of your soil. The kits are inexpensive, and they're easy to find at pet stores, Walmart, and the like. Water your plant with enough pH-neutral water to produce runoff at the bottom of the pot. Collect that excess water, and test the pH of it. That's your soil pH. It's not exact, but it's a good start. Soils high in peat generally lower the pH unless something was added to stabilize it.

Best of luck, and try to be patient while you wait for the renowned CannCom 'green-thumbs' to show up. They'll be here. :jointsmile:
Mr. Clandestine Reviewed by Mr. Clandestine on . brown/yellow spots on lower leaves my plant is about 4 weeks old. the other day i turned off the small fan i have in my box. i sprayed the plant with some water and left it alone for a day, next time i visit it i notice these brown spots on a few of the lower fan leaves. at first i thought that because i sprayed water it might have puddled on the larger leaves and with no fan to help it evaporate, maybe it just sat too long and caused the lights to magnify and burn the plant, but after turning the fan back on, i haven't misted Rating: 5