Botanical profile

Rubus fruticosus 'Columbia Star'

Latin name
Rubus fruticosus 'Columbia Star'
Common name
Thornless mulberry 'Columbia Star'
Type
Fruit shrub
Family
Rosaceae

Rubus fruticosus 'Columbia Star' is a thornless blackberry known for its delicate flavor and superior fruit quality. This fruiting shrub, with its cascading bushy habit, develops long, flexible canes ideal for growing on trellises or as a structured fruit hedge. It produces large, shiny black, elongated, firm, juicy, and exceptionally sweet fruits, perfect for fresh consumption and artisanal processing. Its summer fruiting, on previous year's canes, ensures an abundant mid-season harvest. Its dense green foliage attracts pollinators and contributes to garden biodiversity. Rubus fruticosus 'Columbia Star' combines high yield, excellent fruit holding, and simplified cultivation thanks to its thornless nature.

Care guide

Growing conditions

Light, soil, water and hardiness

Hardiness zone
Zone 6
Exposure
Sun
Watering
Regular, fresh, well-drained soil
Fertilization
Compost or fertilizer for berries in spring
Soil type
Rich, well-drained, slightly acidic
Minimum temperature
-20 °C
Plant appearance

Blooming, foliage and shape

Blooming period
Spring
Flower color
White
Fruiting
Large, shiny black fruits, elongated, firm, juicy and very sweet
Foliage color
Green
Foliage type
Obsolete
Shape
Bushy trailing
Garden structure

Size and growth

Height
2 m (7 ft)
Width
2 m (7 ft)
Growth rate
Fast
Vegetable garden and yield

Companion planting, spacing and harvest

Fruit tree type
Non-everbearing mulberry
Pet friendly
Safe for pets

Pets

Pollinators
Attracts or supports pollinating insects

Pollinators

Butterflies
Plants that attract butterflies

Butterflies

The availability of our plants varies depending on arrivals, seasons, nursery production and supplier availability. Some varieties may be offered for a limited time only, depending on their natural cycle or current stock. These plant profiles are designed to guide and inspire you when choosing plants for the garden, landscaping projects, containers or long-lasting outdoor arrangements.