this is my first time growing begonias. I bought trailing ones back in March and grew them successfully in a back bedroom. some grew taller than others. At the end of May I put them into baskets and troughs and most of them are so tall and upright and look silly ! As I bought them from 2 different places, I don't think there was a mistake.
What have I done wrong please?
And for this year could I cut them off lower down to allow them to maybe trail over?