My Leaf Edges Are Curling Up Over

Im into 3rd week of veg. i have 9 plants under a 600watt mh. the edges of the leaf are starting to curl up over I think its due to heat as it i have noticed it climb above the desired temp a few times. This has never happened before as before i have only used 400watt for veg. could this be dangerous for the plant?


cheers

mrgreen

Yes it can, rise your lamp and place your hand over the canopy when it feels comfortable fix the height.