get hydrangeas to blossom

Question

Looking for help to get hydrangeas to blossom. Mature plants approx. 5 yrs. They did blossom the first couple years. Now I get lots of green, one flower, out of 3 plants. They are for my zone in Maine.

Answer 1

You likely have to much Nitrogen in the soil. This will cause lots of lush green and little to not flowering.

Adding Phosphorous with a fertilizer like Bone Meal will help.

Here are some links to help you.

https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/hydrangea-not-blooming.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/bone-meal-fertilizer.htm