Hydrangea few blooms
I have four hydrangea plants on the north side of the house. They are approximately two feet high and two feet in diameter. They receive morning sun. They were fertilized with holly tone on March 29-2017. They look very healthy with thick foliage. Why do they have very few flowers?
Some reasons for few or no bloom include improper pruning, cold damage which kills flower buds but often not leaf buds so you have a living plant with lush foliage but no flowers, (site may be more susceptible to cold), and too much nitrogen fertilizer.
If you have Hydrangea macrophylla, bigleaf hydrangea, the most common type, this can be susceptible to cold damage. We did have some late spring cold snaps this year.