I have 2 container of blueberries purchased about 1 year ago. It is now late spring and for some reason most of the blueberries are shrivelling and drying up. The leaves look great. I have taken care re: watering issues. I have not noticed any indication of disease or parasites. I will GREATLY appreciate any help with this problem.
I live in Sacramento, California Zone 9b The blueberries were purchased from a local high quality nursery and the variety is supposed to do well in this growing zone.

Your young blueberries have two problems:

First, they are shallow rooted so the top couple inches of soil where most of the roots are dries too fast.

Second, the plants aren't big enough to shade the soil so the soil is too hot. Some plants hate hot roots.

With container grown plants, both problems are magnified. You may have blueberries rated for your zone, but in a container, add a couple zones.