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Hi
I know we've had previous discussions on  this, but i am wondering if the leaves could be crinkling due to the humidity levels in the GH.  I check them daily for greenfly and have found the odd one but not enough to make them as crinkly as they are.   The plants seem quite happy apart from this so I am not too worried at the moment , but am wondering what you thought.

P.

I've got wrinkled leaves on one of 12 plants. I've found just a few greenfly on it so it looks like it doesn't take many to wrinkle a few leaves. I picked them off and it's not getting worse.