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Survives zone 3 through 7
Harvest calendar
Best planted in early spring after your last frost, or in fall before the ground freezes, depending on your climate.
Grown primarily as an ornamental for its large magenta flowers rather than for its fruit — the berries are edible but notably dry, crumbly and seedy, usually cooked into jam or preserves rather than eaten fresh, and extension sources describe them plainly as unappetizing.
- Hardiness
- Zone 3–7
- Habit
- Shrub
- Edible part
- Fruit
- Ripens
- Summer–autumn
- Mature size
- Thornless shrub 1–3 m, suckering into thickets
- Light
- Partial to full sun (forest edge)
- Soil pH
- 6.0–7.0 (near-neutral)
- Environment
- Temperate
- Native range
- Eastern North America — from Nova Scotia and Quebec west to Ontario and Wisconsin, south along the Appalachian Mountains to Georgia and Alabama; naturalized in parts of Washington state, Vermont, and southeastern England.
- Status
- Ornamental
- Years to fruit
- 2–4 yrs
- Growth speed
- Medium growth rate for individual canes (to around 1-2 m in a season), but the colony itself spreads outward year over year via root suckers.
- Spacing
- 100 cm (39 in) apart — about 1 m² (11 sq ft) per plant
- Leaf shape
- Large, simple (not compound), palmately lobed leaves with usually 5 lobes (occasionally 3 or 7), up to 25 cm across and superficially resembling maple leaves — an unusual simple-leaf form for a genus whose leaves are typically compound.
- Root system
- Perennial, spreading rootstock that sends out underground runners well beyond the base of the plant, producing new suckers and forming broad colonies over time.
- Fruit description
- A flat, disc-like aggregate of 30-60 drupelets, red and fuzzy-textured, roughly 2 cm (about 3/4 in) across, resembling a large flattened raspberry. Texture is dry and crumbly rather than juicy, flavor is mildly tart with little sweetness — most sources call it unappetizing fresh and better suited to cooking into jam or preserves.
- Propagation
- By seed — requires a period of cold stratification, sown in early autumn in a cold frame; more reliably by tip-layering canes in July and planting out in autumn, or by division of suckers in early spring.
- 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. Prefers a rich, moist, well-drained loamy soil amended with organic matter — it dislikes heavy clay. Since it is already a vigorous root-suckering shrub, heavy nitrogen feeding mostly pushes more runners rather than better flowering or fruit, so an annual compost mulch is generally sufficient.
How it spreads. Spreads aggressively by root suckers from a perennial rootstock, sending up new stems from underground runners well away from the parent plant — Missouri Botanical Garden describes it as having an 'aggressive, suckering habit' that forms large colonies and needs room or a barrier to stay contained in a garden bed.
Growing tips. One of the few thornless Rubus, which makes it easy to handle in a border. Tolerates more shade than most fruiting brambles — sources list it for full sun to part or semi-shade, consistent with its native habit along moist woodland borders and thickets. Grown chiefly as an ornamental for its large, fragrant, magenta flowers and long early-summer-to-fall bloom period rather than for its fruit. Susceptible to honey fungus like most Rubus; foliage turns gold-yellow in fall.
Grow journal
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