Determining the type of raspberries growing in your yard and how to prune them is confusing. Once you learn the difference between ever-bearing and summer-bearing raspberries, basic pruning techniques and when to prune your raspberries, you can enjoy a harvest from even a small patch of raspberry canes.
Before you begin pruning your raspberries, learn the difference between primocanes and floricanes. Raspberry roots are perennial, but the canes are biennial. Primocanes are the first-year canes and produce vegetative growth. These canes are young, thin and a bright colour. Floricanes are the second-year growth. Floricanes are generally thicker, woodier and produce flowers and fruit. Once you discover the difference between these canes, pruning your raspberries is easier.
Pruning Summer-Bearing Raspberries
Summer bearing raspberries only produce on second year canes, or floricanes. If you prune summer-bearing raspberries to the ground, you will never have berries. In March or early April, remove all weak, diseased or damaged canes to the ground. Leave the most vigorous canes. After the berries are harvested in the summer, prune all the fruiting canes to the ground, leaving the primocanes for next years' production.
Pruning Ever-Bearing Raspberries For Two Crops
Ever-bearing raspberries produce two crops throughout the season. The first crop is produced on the primocanes' tips. The second crop is produced on the lower portion of these same floricanes. In March or early April, remove all weak, diseased and damaged canes leaving only the vigorous ones. Prune the tips of the canes. Once the floricanes have produced in the summer, remove the old fruiting canes to the ground, leaving the newest primocanes for a fall harvest.
Pruning Ever-Bearing Raspberries For One Crop
Ever-bearing raspberries can also be pruned for one large fall crop. In March or early April, prune all canes to ground level. This method eliminates the summer crop, but the fall crop matures one to two weeks earlier. This pruning method is easy, fast and requires no special attention to which cane has fruited and which has not. Skipping the summer crop also deters problems with late spring frost damage and disease.
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- "Backyard Fruits and Berries"; Diane Bilderback, Dorothy Patent; 1984
- Iowa State University; Pruning Raspberries; Richard Jaruon; April 2006
- University of Tennesee; Pruning Raspberries and Blackberries in the Home Garden; David W. Lockwood
- Ohio State University; Raspberries for the Backyard Fruit Planting; Gary Gao