10 year old climbing hydrangea
I planted my climbing hydrangea about 10 years ago. It is climbing up a mighty oak tree in the front yard. Currently it must be about 70 feet tall and every year it is gorgeously green and full of leaves, there are many lateral branches all over the plant. But it has never flowered, will this be the year? One can only hope. Do I need to fertilize it for flowers? If so, what fertilizer should I use and how much and when? I have never fertilized the plant. I am in Suffolk County, New York.