HI
Last spring, I inadvertantly pruned back a large amount of my newly established weigela. This year, what was left of the plant produced an enormous amount of beautiful flowers but what I had pruned back did not grow back ! It has now started to grow but it is a very slow process. So with hindsight, maybe I should not have pruned it so drastically ::) :o
Prune it, but be gentle with it. ;)