Q.Climbing hydrangea
We have three climbing hydrangea. It has been four seasons and still no blooms on any. The plants climb, look leafy green, but will not bloom. Should we just cut them down?
You may have too much nitrogen in your soil.
Have a soil test done, your County Extension Office for a soil test.
Phosphorous can help boost flowering; an application of Bone Meal is an easy way to do this.
https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/hydrangea-not-blooming.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/bone-meal-fertilizer.htm