Rosaceae

southern dewberry

Rubus trivialis

southern dewberry

Photo: Alex Abair — CC BY 4.0 · source

2
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9

Survives zone 6 through 9

Harvest calendar

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Best planted in early spring after your last frost, or in fall before the ground freezes, depending on your climate.

Sweet-tart, blackberry-like; earliest of the group, worth growing for season extension.

Hardiness
Zone 6–9
Habit
Groundcover
Edible part
Fruit
Ripens
May–June — the earliest bramble crop
Mature size
Trailing semi-evergreen groundcover 20–40 cm tall, the bristly canes running 1–3 m and tip-rooting
Light
Full sun
Soil pH
6.0–7.0 (near-neutral)
Environment
Warm temperate, sandy ground
Native range
Native to the southeastern United States, from Virginia south to Florida and west to Texas, on stream banks, roadsides, thickets and old fields, generally on dry sandy soils.
Status
Wild
Years to fruit
2–3 yrs
Growth speed
Vigorous trailing growth — canes can extend well over a meter in a season and root at the tip to start new plants.
Spacing
120 cm (47 in) apart — about 1.4 m² (16 sq ft) per plant
Leaf shape
Compound leaves with 3–5 coarsely toothed, broadly lanceolate leaflets on thin, bristly, recurved-prickled trailing canes — a low sprawling vine rather than an upright shrub.
Root system
Roots at the cane tips wherever they touch soil — tip-layering is its main means of natural increase — in addition to some spread from the crown.
Fruit description
A blackberry-type aggregate fruit about 3 cm long, glossy black when ripe, very juicy and sweet with good flavor — among the better-tasting of the trailing dewberries.
Propagation
By tip-layering in July — its natural means of spread — plus division of rooted cane tips, semi-ripe cuttings in July–August, or stratified seed sown in autumn.
Pollination
Self-fertile

The edible parts listed above are a starting point, not a field guide. Identify a plant with certainty — ideally against a local authority — before eating any part of it, and read the full disclaimer. Spotted something wrong? Report it.

Growing guide

Fertilizing. Naturally suited to lean, dry, sandy ground, so established plants need little supplemental feeding; a light spring mulch of compost is usually enough, and overly rich, wet soil tends to encourage disease more than it improves cropping.

How it spreads. A true trailing dewberry — thin, sprawling canes run along the ground and root wherever the tip touches soil, rather than growing as an upright cane like a raspberry or erect blackberry; this tip-rooting lets it form dense low thickets.

Growing tips. Blooms earlier than almost any other wild bramble — solitary flowers open March–April and fruit can ripen by May, weeks ahead of upright blackberries, making it useful for season extension. Canes are low and bristly with small recurved prickles and reddish glandular bristles; best grown in full sun on a low trellis, or simply allowed to trail as groundcover.

Grow journal

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About the data

Zone figures are typical published ranges — microclimate, drainage and siting shift them by a zone in either direction. Store links are found by an automated search, refreshed every six weeks. Availability is seasonal; stock and prices are not tracked.

Venlo — a reference for cold-hardy edible plants