Rubus Ulmifolius (Thornless Blackberry)
Rubus Ulmifolius (Thornless Blackberry)
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Rubus Ulmifolius winds its way through hedgerows and forgotten corners with a kind of wild, uncontainable charm. This rambling, thorny shrub sends out long arching canes clad in serrated, elm-like leaves, creating a dense, tangled form that birds and bees adore. In summer, soft pink to pale lilac flowers appear like scattered confetti, delicate and fleeting, yet signalling the promise of what’s to come.
By late summer into autumn, the flowers give way to clusters of glossy blackberries—rich, juicy, and irresistible to both wildlife and the forager’s hand. It may be unruly in habit, but Rubus Ulmifolius offers more than fruit—it brings a sense of nostalgia, of bramble-stained fingers and sun-warmed afternoons, and of nature doing exactly as it pleases.

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Mature height
1-2 meters
Mature width
1-2 meters
Spacing
1-1.5 meters
Evergreen/Deciduous
Deciduous
Foliage
Blackberries (deep black); white flowers
Flowering Period & Fruit Development/Harvest
Late spring to early summer (November to December); fruit develops after flowering, typically ready for harvest in summer (January to February)
Sun tolerance
Full sun
Maintenance
Moderate. Provide a sturdy trellis or support, water regularly especially during flowering and fruit development, mulch to retain moisture, and prune out old fruited canes after harvest
Root System
Perennial, woody and spreading root system, forming a crown with lateral roots. Blackberry plants may produce suckers from the root/crown area.