leaf curling

[icbh707]

Plants are three weeks into 12off 12on. Look healthy. But the tops
of some of the leaves are curling down from the vein, not tips.

ppm's are 1320-1280 using GH nutrients. ph is 5.9 to 6.1.

any idea whats going on?

icbh707 Reviewed by icbh707 on 04-10-2009. leaf curling Plants are three weeks into 12off 12on. Look healthy. But the tops of some of the leaves are curling down from the vein, not tips. ppm's are 1320-1280 using GH nutrients. ph is 5.9 to 6.1. any idea whats going on? Rating: 5