You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser.
worrying about the browning in the center

of the leaves?
-
20140722_124734.jpg
956.3 KB
· Views: 0
http://www.growweedeasy.com/marijuana-symptoms
Given that leaf turning down, I'd guess
Signs of Nitrogen Toxicity
- Dark green leaves and foliage
- Leaf tips may turn down, without signs of overwatering.
- You may notice yellowing on the affected leaves or other signs of nutrient deficiencies as time goes on
- Nitrogen toxicity is often but not always accompanied by nutrient burn
- The Claw often seems random, affecting leaves here and there
- Heat and pH problems will make the clawing worse, as they stress out the plant and lower her defenses
- As time goes on, the claw leaves will eventually start turning yellow, getting spots, and dying
http://growweedeasy.com/nitrogen-toxicity-cannabis