Hello all,

I'm a newbie, on my first grow. I just switched from 24-on to 12/12 yesterday (600w HPS) , and today when the lights came on I noticed that about half my plants have varying degrees of a leaf issue that I'm unsure about. Some of the leaves have begun to curl upwards along the edges, with accompanying browning and a thin appearance. There's also a bit of yellowing on all of the plants, which I was told was signs of growth and not to worry. But this is new, and I'm concerned and confused.

I'm using rockwool cubes and flooding with Superbrand Grow Aqua, which I recently increased from about 350ppm to about 500ppm. My pH is in the 6.0-6.3 range consistently.

My rockwool cubes are soaked, I think I may have over-watered them 2 days ago (haven't watered since), and I am currently trying to pull out some solution by setting them on towels and hitting them with a fan.

Any help or advice would be greatly appreciated.



Here's a couple of pics...

http://img401.imageshack.us/img401/1328/dsc02363ha1.jpg

http://img401.imageshack.us/img401/8656/dsc02368bp3.jpg
Baruce Reviewed by Baruce on . some leaves thin, curled-upward, browning edges Hello all, I'm a newbie, on my first grow. I just switched from 24-on to 12/12 yesterday (600w HPS) , and today when the lights came on I noticed that about half my plants have varying degrees of a leaf issue that I'm unsure about. Some of the leaves have begun to curl upwards along the edges, with accompanying browning and a thin appearance. There's also a bit of yellowing on all of the plants, which I was told was signs of growth and not to worry. But this is new, and I'm concerned and Rating: 5