Birch -- Clumps

Birches are usually clumped in multiples of three, four or five for appearance sake. Clumping usually produces a tree with a crown or top growth equal to a single tree with three smaller trunks.

Single trees can be clumped easier when smaller than as larger plants. If single plants are to be clumped, carefully remove some of the soil around the root system before planting. Water thoroughly after planting.