How Big Does a Raspberry Bush Get?

Black Raspberry Bush

• Black raspberries, which are sometimes called blackcaps, produce a high volume of fruit. The black raspberry bush does not need trellis support. However, North Carolina State University suggests cutting the bush to maximum height of 30 inches. Do this cutting, which is known as tipping, every summer.

Purple Raspberry Bush

• The purple raspberry bush is a hybrid species between red and black raspberries. Purple raspberries feature the same growth pattern and maintenance, as does the black raspberry bush. This species does not require support by a trellis but the bush must be trimmed, or tipped, to maintain a maximum height of 30 inches. Tip the bush in the summer.

Red Raspberry Bush

• Supporting red raspberries with a low trellis ensures the plant remains upright and healthy. Prune the red raspberry bush two times per year: once in the spring and once immediately after harvest. Ohio State University Extension advises trimming red raspberry bushes to 5 feet high.

Spacing Between Bushes

• Spacing between raspberry bushes ensured the bush reaches its ideal height reduced the likelihood of a disease outbreak. Space raspberry bushes apart according to their species. Ohio State University Extension states you must have at least 10 feet of space between red raspberry rows is needed, while purple raspberries require a minimum of 12 feet between rows.