Weeping Cherry growing wide but not tall
My miniature weeping cherry label says tree is supposed to grow 12' - 18'. After 5 years, it has grown no taller than 4' but limbs are extremely long. Since the the tree is so short the ends of limbs are lying on the ground. The trunk is very thick, limbs are too. It seems very healthy in every other respect, no since of disease or pests. It's bloomed every year but now seems to put all it's energy into limb growth so only bloomed at tips of limbs the past 2 years. I have never pruned it as I thought it might put more energy into limb growth instead of height. Soil is clay with poor drainage but all my other trees - flowering plums, kousa dogwood, crepe myrtle, quansan? cherry, maples and willows - are doing great. One of my flowering plums was planted at same time several yards away and is doing well. I currently don't have photos but can take some if needed. Have any ideas what's going on and what I should do?
Haywood County North Carolina trees and shrubs
Would it be possible for you to provide a few pictures.