Abstract: Successful biennial raspberry production depends on optimal conditions in all developmental phases during the two years. Adequate vegetative growth with many nodes on the primocanes in the first year will provide many flowering sites, and thereafter, favourable conditions for flower initiation and differentiation will optimize yield potential.
Abstract: Raspberries can be an enjoyable crop for the conscientious gardener. A well-maintained raspberry bed can provide fruit for 10 to 20 years. Red raspberries grow well throughout New England, but black and purple raspberries and blackberries lack the hardiness to be grown north of well-sheltered sites in southern Maine and New Hampshire.