Holly leaves turning brown and dying
My house had two holly bushes (male and female) when I moved in 3 years ago. Both were healthy and bushy and seemed well established. They both looked great this spring, I even commented how green and shiny the female's leaves were. I fertilized with HollyTone in the spring.
We have had a weird spring--hot, then rainy, rainy and cool and now really hot. I have tried treated them with an anti-fungal I use for more rose bushes with no change.
Now the leaves are turning brown (usually on the edges) and then move into the center, until the leaves turn brown/black and drop off. The female is worse than the male. When I scrape the skin, the underneath looks green and healthy.
What do I do???