I have a 25-year-old flowering cherry which flowered quite sparsely this year, and now that the leaves are out, they are also quite sparse. The leaves are perfectly healthy and all along all branches; the bark and trunk are also perfectly healthy.
Does anyone have any ideas about possible reasons for this, other than that the tree is getting on in years? I would be desperately sad to lose it, as the display is normally breathtaking in spring. Thanks.