Rich, I see no one has answered your question, so what I would suggest is to take some photos of the affected parts and re-post to your message. And also, where you live in the country. You can also send your photos to your local county extension office for some diagnostic help. Or, your local Master Gardeners. They can tell you very well what's going on with your little cherry tree and your blueberries. I'm thinking your blueberries do sound like they've been affected by some sort of fungus, OR the new tender growth was simply frozen off. I would trim away the affected tips and see if you get a new flush that will also produce blooms for you.

Patty S.

Thanks for the input and ideas. I couldn't figure out how to post a photo here, but I emailed one to Cummins, and they didn't seem too worried. The blueberries are blooming pretty well already. Maybe it the last frost was worse than I thought. I guess I'll have to wait and see.
R