I have a 3-year-old Tuff Stuff (a smaller Mountain Hydrangea). Until a week ago, the leaves were gorgeous green. But every year, they curl and turn black. It gets morning shade then sun in the afternoon. It's well drained and gets watered several times a week. I'm careful not to over water. And I've cleared all other plants away from it, thinking that may be an issue. I haven't added any fertilizer or other sprayed it.
I love the blooms but this happens every year. And the plant starts looking more dead than alive.
Thoughts on what this might be, before I chuck it at the end of the season and try something different?
Thanks in advance.