Re: How and When do you care Kwanzan Cherry Tree
Possibly the planting site is too moist. Cherry trees are often touchy about drainage. It seems this could account for the premature defoliation, lack of vigor and bare sections. The light color of the leaves could be due to excess soil moisture or to infertility - in either case the foliage is not being adequately supplied with soil minerals due to conditions at the root.
Cutting trees back reduces subsequent overall top growth. When a tree is struggling, whacking it back does nothing more than add to its troubles.