Q: I bought a Celestial dogwood four years ago but it has never bloomed. It is twelve feet tall and looks very healthy.

A: In my experience, kousa dogwoods are slow to begin flowering. Your ‘Celestial’ is a cross between kousa dogwood and our native dogwood, so late flowering is normal. If the tree has a full compliment of leaves and seems happy, leave it alone to bloom when it wants to.