Blueberries Are Drying Up Then Dropping

Question

We have a few blueberry bushes and this year some are growing, then they dry up and drop. Do you know why this is?

Answer 1

This should help:
https://www.gardeningknowhow.com/edible/fruits/blueberries/lower-soil-ph-blueberries.htm
And this too:
https://www.gardeningknowhow.com/edible/fruits/blueberries/blueberry-fertilizer.htm