Winter Care for Blueberries, Raspberries, and Blackberries

Cold hardiness by type and zone, winter mulch, rabbit fencing, and when to prune blueberries, raspberries, and blackberries. Sources from Minnesota, Orego...

Published 2026-10-07 by ThriveThyme

blueberries raspberries blackberries fruit winter pruning

Winter Care for Blueberries, Raspberries, and Blackberries

The biggest winter decision happens at planting: choose a type that is hardy in your zone. After that, winter care is mostly mulch, rabbit fencing, and saving most pruning for late winter.

Open each plant page for a zone-specific line: blueberries, raspberries, and blackberries.

Blueberry Hardiness by Type

Half-high (Northblue, Northcountry, Northsky, Polaris, St. Cloud): Bred at the University of Minnesota for zones 3 and 4. The short plants are often insulated by snow.
Lowbush: Very cold hardy. Oregon State notes it is harvested from wild stands in Maine and eastern Canada. Needs long cold winters.
Northern highbush (Bluecrop, Patriot, Duke): Oregon State lists zones 4 to 8. UMN rates Bluecrop and Patriot good in zone 4 and fair in zone 3.
Rabbiteye: Oregon State lists zones 7 to 9. NC State notes only highbush reliably survives winters that regularly drop below 10F, so rabbiteye is not recommended in its mountains.
Southern highbush: Between northern highbush and rabbiteye in climate adaptation. Best where winters are mild.

Blueberry Winter Care

1. Keep 2 to 4 inches of acidic mulch, such as pine needles, pine bark, or oak leaves, over the roots. UMN adds winter mulch in September or October. 2. Fence plants with chicken wire in November where rabbits or deer browse. 3. Stop fertilizing by midsummer. NC State ends applications by mid-August in the Coastal Plain and mid-July in the mountains. 4. Prune in late winter or early spring, after the coldest weather and before growth starts. Remove old, weak, and dead stems at ground level. UMN suggests keeping 4 to 6 older stems and 1 to 2 strong new shoots per mature bush.

Raspberry Hardiness

University of Maine Extension ranks red raspberries as the hardiest brambles, followed by purple raspberries, black raspberries, and blackberries.
UMN rates Boyne, Killarney, Latham, Nova, Heritage, and Autumn Britten good to very good in zones 3 and 4.
Black and purple types such as Bristol, Black Hawk, and Royalty rate fair to poor in zones 3 and 4. UMaine notes temperatures below 5F can injure or kill most black and purple raspberry canes.
Winter injury shows in spring as dead cane tips. Canes buried in snow usually survive to the snow line.

Raspberry Winter Care

1. After harvest, cut summer-bearing canes that fruited to the ground. 2. Where winter injury is common, UMN suggests waiting until spring to thin new canes so you can see which ones survived. 3. Apply winter mulch in November and fence out rabbits, which eat canes down to the snow line. 4. Before buds break in spring, thin red raspberries to 4 to 5 sturdy canes per foot of row. Cut canes to about 12 inches above the support, removing no more than a quarter of each cane. 5. Fall-bearing types grown for one fall crop: mow all canes to the ground in early spring. This also sidesteps cane injury.

Blackberry Hardiness

Blackberries are less hardy than raspberries. NC State notes canes can be injured when temperatures drop below 0 to 10F. UMaine puts the risk below 5F.
Iowa State ranks erect thorny types as the hardiest, semi-erect types (many of them thornless) next, and trailing types as the least hardy.
Iowa State names Darrow and Illini Hardy as the hardiest for Iowa. Primocane-fruiting types such as Prime-Jim and Prime-Jan fruit on new canes, so they can still crop after old canes winter-kill.
Mapped onto USDA zone lows: zones 7 to 9 rarely see cane injury, zone 6 sees it in hard winters (especially on thornless types), and zone 5 and colder often lose canes above the snow line.

Blackberry Winter Care

1. Remove floricanes that fruited after harvest. 2. Mulch the crown area to protect roots and hold moisture. 3. Wait until the coldest weather has passed to prune, so you can cut back to live wood. 4. In early spring, UMaine suggests thinning to 5 to 7 sturdy canes per hill, cutting side branches back to about 12 inches, and tying canes to the support.

Next Steps

Tick the berry task on Garden to Bed, read the dormant pruning overview, and see what to mulch before winter. Bushes and canes come from nurseries, not seed packets.