Growing Raspberries and Blackberries: Site Prep, Trellising, and Variety Selection

Brambles (raspberries, blackberries) reward careful planning with years of harvest. Their thorns and shallow roots demand upfront investment in site preparation.

Site Requirements

• Air circulation and drainage: Critical for disease prevention
• Pre-plant weed control: Essential—mature brambles resist weeding
• Raised beds: Excellent for drainage and root protection
• Rotation: Avoid sites with recent brambles, potatoes, tomatoes, eggplant (Verticillium wilt risk)
• Wild bramble removal: They harbor diseases
• Spacing: 8'+ between rows

Trellising Systems

Most need support. Standard: T-posts with crossbars, taut wires/twine between. Trailing blackberries can use wire fencing. Install at planting—disturbing roots later damages plants.

Understanding Biennial Canes

• Primocanes: First-year vegetative growth
• Floricanes: Second-year flowering/fruiting canes (die after harvest)
• Everbearing raspberries: Also fruit on first-year primocanes in fall

Remove spent floricanes after harvest. Thin primocanes for air flow.

Variety Selection by Type

Red Raspberries

Cool climates (800-1800 chill hours). Summer-bearing (floricane crop) or everbearing (floricane + primocane crops). Red, yellow, or purple fruit.

Black Raspberries (Black Caps)

Rich flavor, no core. Crown-sprouting (easier containment). Plant 3' apart in raised beds.

Blackberries

Prefer heat; some cold-hardy varieties exist. Upright/bush: Less trellising, fewer thorns, more cold-hardy. Trailing: More maintenance. Thornless varieties: 'Arapaho', 'Black Satin', 'Chester', 'Navaho', 'Hull', 'Triple Crown'.

Match variety to climate, space, and maintenance tolerance. The right bramble in the right place produces abundantly for a decade-plus.