I have two 10 year old Dr. Hurd manzanitas that have yellow/brown leaves on them. I've never seen them like this before. Usually it's a water problem with manzanitas, too much or too little. Have had our irrigation turned off the past few weeks and the soil is dry. But it rained extensively about 10 days ago. Mature manzanitas should be able to go a long time without water, so not sure that's the problem. The plants do have berries, which is a good sign. I also noticed a couple of red galls, but only two.
We're in Sacramento California, It has been in the 80's the past 6 weeks, but has recently gotten very hot (99 today).
Looking forward to suggestions on how to save these lovely plants.