Hi, I am in Northern NJ Zone 6.

I have a row of Mountain Fire Andromeda bushes that have been doing fine for 12 years.

They are at the end of a driveway, nothing has changed in their physical environment this year.

First picture gives you a sense of how nice they all are doing.

However, one bush has damage, curled black leaves.

One picture of the damage from a distance and one a close-up.

Any ideas what might be causing this and how to help?

Thank you

Herman