Allen is part of the Rubus genus and is a Black Raspberry variety. Its scientific name is Rubus occidentalis 'Allen'.
This variety is just about the sweetest of all black raspberries. The plant breeders at the NY Experimental Station crossed Bristol with the fine old variety Cumberland to get this superior berry. Bristol is one of the very best blacks and Cumberland is noted too for its superior quality. The result, one of the sweetest and highest quality berries yet produced. This is also a vigorous growing variety and produces large crops year after year. Free from disease and hardy. Berries are large, glossy black, firm, and juicy and fine-flavored. You will want at least a few plants of this fine berry in your garden. Ripens early July. Zones 4-8.This variety is a Fruit that typically grows as an Perennial, which is defined as a plant that matures and completes its lifecycle over the course of three years or more. Allen is known for growing to a height of approximately 1.83 metres (5.95 feet).
This variety plant info is provided by the myfolia gardener's wiki. All details about Allen have been kindly provided by our members.