Boysenberry Thornless – Desert Horizon Nursery

Boysenberry Thornless

Rubus ursinus × idaeus 'Thornless'
Categories:
Edibles  ·  
Herbs & Vegetables
Light
Morning sun / afternoon shade
Water
Keep the root zone consistently moist but not waterlogged, especially during flowering and fruiting. Use drip irrigation; increase watering during extreme heat and check containers frequently.
Size
6-8 ft tall × 4-6 ft wide (with support)
Habit
Mounded – spreading shrub – trailing canes
Toxicity
Non-toxic
Description
A mostly thornless, trailing bramble producing large, dark purple-red berries with a sweet-tart flavor. Growing and fruiting can be challenging in Phoenix because of extreme summer heat and limited winter chilling.
Bloom Time
Spring
Deciduous / Evergreen
Semi-evergreen
Special Features
Attracts Bees / Pollinators, Drought Tolerant, Edible, Thornless, Thorny / Spiny
Growth Rate
Moderate to fast
Growth Habit
Mounded – spreading shrub – trailing canes
Mature Size
6-8 ft tall × 4-6 ft wide (with support)
Flower Color
White to pale pink
Foliage Color
Green
Landscape Use
Border / Bed, Container / Patio, Edible / Orchard, Trellis / Arbor / Wall
Garden Style
Container / Patio, Edible Garden, Pollinator / Wildlife
Soil
Amended / Rich, Prefers Acidic, Well-Drained
Companion Plants
Afternoon-shaded beds, Chives, Strawberries
Non-toxic
Non-toxic
Care Instructions

Light: Morning sun with afternoon shade; avoid reflected heat from walls and pavement. Summer shade cloth can reduce leaf scorch and fruit sunburn.

Water: Keep the root zone consistently moist but not waterlogged, especially during flowering and fruiting. Use drip irrigation; increase watering during extreme heat and check containers frequently.

Soil: Well-drained soil enriched with compost; slightly acidic soil, approximately pH 5.5–6.5, is preferred. Raised beds or large containers can help manage Phoenix’s alkaline soils.

Mature size: Approximately 4–6 feet tall when trellised, with a 6–10-foot spread; trailing canes may reach 10–15 feet long.

Bloom: White flowers in spring on second-year canes, followed by berries in late spring to early summer. Timing and yield depend on winter chilling and spring temperatures.

Evergreen / deciduous: Deciduous; may retain some leaves during mild winters.

Growth rate: Fast with adequate moisture, nutrition, and protection from excessive heat.