Leaves closing up

[Green Love]

The leaves are folding up. ?. Then some of the edges of the leaf are curling inward. Any ideas? Its happening on the node before the newest set.

[hudson88]

Heat stress? Whats your temps at the top of the canopy?

[Green Love]

Thats what I concluded, heat stress. Appericate the help. Couldnt figure it out for the life of me.