My Multi Blue Clematis is not multi!
I have this clematis for about 4 years. It's doing ok and growing stronger every year except I was never able to see any double blooms on it.
This last winter was very mild in our region and so a lot of stems remained in tact. I pruned it to about 3 feet.
It took off very nicely but guess what, only single blooms.
Is there anything special I need to do in order to make it bloom double? Please help.