Thornless Blackberry 'Adrienne' (Rubus fruticosus 'Adrienne')

Thornless Blackberry 'Adrienne'

Rubus fruticosus 'Adrienne'

Juicy purple berries hang like tiny jewels, a productive edible shrub. Deciduous fruiting shrub.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; 6+ hours of direct sunlight weekly for optimal fruit production
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Watering Water deeply when the top 5cm of soil dries out; avoid waterlogging to prevent root rot
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Temperature Cold-hardy to -15°C; tolerates warm summer temperatures up to 30°C without heat stress
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Characteristics

  • Leaf: Compound trifoliate leaves with glossy green foliage and serrated margins
  • Flower: Clusters of small, five-petaled white blossoms
  • Stem: Thornless, flexible canes that trail or grow semi-upright
  • Fruit: Aggregate deep purple-black drupes when fully ripe
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Care Guide

Watering

Keep soil consistently moist during fruiting to support berry development

Fertilization

Apply balanced organic fertilizer in early spring to support new growth. Avoid high-nitrogen fertilizers that promote leaf growth over fruit production

Composted banana peel tea:Steep fully composted banana peels in water for 24 hours; dilute 1:20 with water for root drench applications
Pruning
  • Cut old fruiting canes to ground level immediately after harvest to make space for new growth
  • Thin new young canes to 4-6 per plant in late winter to improve airflow and fruiting capacity
  • Trim trailing canes to maintain desired shape and prevent overcrowding
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA confirmed non-toxic; no adverse effects from ingestion

Humans: Edible fruit and foliage; no toxic compounds identified

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Garden Uses & Culture

Culture: N/A

Usage: Edible fruit production for fresh eating, jams, or baking; ornamental garden shrub