How to Prune Summer-Bearing Red Raspberries
Pruning summer-bearing red raspberries is essential for controlling disease, preventing overcrowding, and ensuring a solid harvest. This guide outlines the specific steps for spring and fall maintenance, keeping your hedgerow tidy and productive.
What you need
- Garden pruners
- Gloves
- Trowel or spade
Steps
- In March or early April, remove weak, diseased, or damaged canes at ground level. Leave only the most vigorous canes (about 1/4 inch in diameter when measured 30 inches up). Space remaining canes about 6 inches apart. Prune back the top 1/4 of the canes to prevent them from becoming top-heavy. If winter dieback was minimal, prune back to live tissue. Keep the plant confined to a one- to two-foot-wide hedgerow, removing any shoots growing beyond this boundary.
- If you are planting new summer-fruiting raspberries in fall or winter, check the cane length. If they are long, year-old canes ready to fruit, do not prune upon planting. However, for new canes intended for future seasons, some growers recommend cutting them back to an inch or two from the ground to prevent first-season flowering and fruiting.
- After the first frost, remove all second-year canes that produced fruit during the summer, cutting them at ground level. Leave all first-year canes to overwinter. If you practiced double-cropping, cut those specific canes down to ground level immediately after the summer harvest.
- If aiming for a double crop, select the strongest 6-8 canes per meter. Leave these at around 1 meter in height and cut off the rest at ground level. After the summer harvest, cut these fruiting canes down to ground level immediately.
Why it works
Why Prune?
Pruning increases yields and helps control diseases. It also facilitates harvesting and other maintenance tasks. Proper pruning prevents overcrowding, which reduces susceptibility to pests and disease, while maintaining a neat garden appearance.
Related on Gardeners Bible: How to Prepare a No-Dig Garden Bed for Early Summer Vegetables, How to Plant Garlic This Fall for a Big Summer Harvest, How to Divide Perennials in October, How to Plant Spring Bulbs for a Full Season of Color.
If it goes wrong
Overcrowding Issues
If the hedgerow becomes too wide, remove shoots growing beyond the one- to two-foot boundary. This prevents the plants from becoming top-heavy and maintains air circulation.
Winter Damage
If canes suffer significant winter dieback, prune back to live tissue. If dieback is minimal, standard topping of the upper 1/4 is sufficient.
