Blueberry bush (patio type)

Question

Blueberry bush flowers but doesn’t produce plump berries. Looks like empty shells.

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Answer 1

You may have a few different reasons for the lack of fruit.
I would first suggest a lighter colored pot for a container Blueberry.
Also keep an eye on the soil moisture level, keep it moist but not soggy. Make sure the container is well draining.

This article has more information.

https://www.gardeningknowhow.com/edible/fruits/blueberries/grow-blueberries-in-pots.htm