[Harmless Teddy Bear]

High Bush blue berries are normally trimmed to six feet tall but they can grow up to twelve feet.

So small trees.

[alexander_busek]

High Bush blue berries are normally trimmed to six feet tall but they can grow up to twelve feet. So small trees.

Correct. Though height, alone, is not sufficient to distinguish trees from, say, herbaceous plants.

But blueberries are, in fact, prostrate shrubs, and are, indeed, distinguished from trees by their multiple stems and shorter height.

Regards,