Pink Diamond Hydrangea Tree
I have a Pink Diamond Hydrangea tree that was planted in 2006. When I received it, it was about 3'-4' tall. It blooms every year but what I don't understand is why it doesn't get any taller. It is no more than 5' tall if that and I just don't understand it. It's get sun and it's fertilized.....any suggestions? When it was purchased, I was under the impression that it was supposed to get to a mature height of at least 15' high! This April it would have been planted for 8 years! I can say that I've never pruned it but I didn't know that I needed to. I'm also in CT but that shouldn't have anything to do with it because it blooms....very beautiful!
P.S. I read an article that talked about 'winter' fertilizing trees but I didn't know that was a best practice. I always thought fertilizing was done in the spring and summer.