Small blueberries can turn a promising harvest into a bowl of tiny blue marbles, especially when the bushes look healthy and leafy. The good news is that undersized fruit usually points to a specific growing problem, and the culprit may have nothing to do with the variety of blueberry planted in the garden.
Blueberries need the right combination of pollination, moisture, sunlight, soil conditions, and plant energy to fill out properly. A bush can produce plenty of berries while still struggling to enlarge them, so the mystery often requires a little detective work. Before blaming the weather or reaching for more fertilizer, check these common causes.
