That looks like molybdenum deficiency (twisting) possibly combined with magnesium deficiency (rusty spots between veins).

If it's just one leaf though I'm not going to say for sure.

Check your pH, and be sure that your ferts or supplements contain micronutrients.

A leaf that shows that twisting but is otherwise healthy could be from physical damage as it was unfolding.
stinkyattic Reviewed by stinkyattic on . whats wrong with this leaf just found this strange leaf on my plant :( can anyone one help with a diognosis :what: cheers buddy Rating: 5