Hello B I wish I could help you out on this but I'm affraid I always get a bit stuck when it comes to plant problems
It's only the one and the other four are fine ? ..................... Maybe it's just how that plant is ?
Maybe there is nothing wrong and the plant would just go like that no matter what the conditions or how it was looked after ?

Hmmm, I'm kinda grasping at straws here I think


Anyway I doubt there is a lighting problem as the others are fine, and it's in the same tempreture and being watered the same has the others and they are fine.
Only thing I can think of B, is to just keep it growing and keep you're fingers crossed ......................... I'll cross mine for you


Sorry B ............................... love mand xxx