I have a shooting star hydrangea that I bought in a small pot at Whole Foods. I planted it in my yard in morning sun, afternoon shade; and while it grows nicely each year, it has not bloomed since planted. I also fertilized in spring when new growth started. I have not pruned it, not knowing if it needed the old wood. Any ideas?
Shooting Star Hydrangea Not Blooming
Certified GKH Gardening Expert
This is most likely a Nitrogen issue. To much Nitrogen will cause lots of leaves but no flowers.
Phosphorous can be added to promote flowering. Bone Meal is a good way to do so.
Here are some links with more information.