What does it mean when a leaf curls?

[tekneeqs]

The leaves are looking healthy and green, except that around the leaves it seems to be curling upwards. What could it possibly be?

[mscaboo]

most likely heat or over fertilization

[invision]

it could be the plant needs some magnesium put in it it could be really nothing a pic would help, add a teaspoon of epsome salt to a spray bottle and spray them once a day right before lights come on this should do the trick.

have you tested your PH?

[Anathema2121]

Here is the best thing ever for helping diagnose what is wrong with your plant. Has pics of plants with about every problem you can imagine as well as what to do to correct it. Plant Abuse Chart (http://www.drugs-forum.com/growfaq/97.htm)