rugosa rose

Photo: Qwert1234 — CC BY-SA 3.0 · source

Survives zone 2 through 7

Harvest calendar

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

Rugosa rose produces the largest, fleshiest, best-tasting hips of the six species here, genuinely excellent for jam and syrup, and is also the most disease-resistant rose in the group. Its strong suckering habit is a double edge — a useful trait for stabilizing sandy ground, but also the reason it has become an invasive coastal weed in parts of Europe and North America outside its native range. ⚠ Deseed the hips before eating: the ring of stiff hairs around the seeds is a gut and skin irritant, and is what old-fashioned itching powder was made from. Strain it out of any purée or syrup.

Hardiness

Zone 2–7

Habit

Shrub

Edible part

Fruit

Ripens

Summer–autumn

Mature size

Dense suckering shrub 1–1.5 m, occasionally 2 m, forming wide thickets

Light

Full sun

Soil pH

6.0–7.0 (near-neutral)

Environment

Coastal

Native range

Coastal eastern Asia — northeastern China, Japan, Korea, and southeastern Siberia (the Russian Far East) — where it grows naturally on beach coasts and sand dunes.

Status

Both wild and cultivated

Years to fruit

2–4 yrs

Growth speed

Medium to fast — clumps typically mature and begin producing well within 2–3 years, then continue to widen via suckers.

Spacing

150 cm (59 in) apart — about 2.3 m² (24 sq ft) per plant

Leaf shape

Pinnately compound leaves 8–15cm long with 5–9 (usually 7) elliptical leaflets, 3–4cm long, with a distinctively deep corrugated (rugose/wrinkled) texture — the source of both the scientific and common 'wrinkled rose' name. Stems are very densely covered in numerous short, straight prickles, making it one of the thorniest roses in general cultivation.

Root system

Strongly suckering and rhizomatous — spreads via underground runners from the crown to form dense thickets. This is the trait directly responsible for its usefulness in stabilizing sandy or coastal soil, and also for its documented invasiveness on dunes outside its native range.

Fruit description

Produces the largest, fleshiest hips of the six species — 20–30mm in diameter, often wider than tall (tomato-like in shape), orange-red, with a comparatively thick flesh layer rather than the thin flesh typical of most wild roses. Flavor is notably sweet. Vitamin C content is high, reported up to about 2.75% dry weight. Widely regarded as the best-tasting and easiest-to-process hip among wild roses, and a favorite for jam, syrup, and tea.

Propagation

Rose seed is slow to germinate — even sown fresh-ripe in a cold frame it may take up to 18 months. The usual acceleration is to scarify seed and warm-stratify it 2–3 weeks in damp peat at 27–32°C, then cold-stratify 4 months at 3°C. It is also propagated by half-ripe cuttings in July, hardwood cuttings 20–25cm long in early autumn, layering, and — because it suckers so freely — division of root suckers is an easy and reliable method, arguably the easiest of the six species to propagate vegetatively.

Pollination

Flowers are notably rich in nectar and pollen and strongly attractive to bees — beyond simple self-fertility, rugosa is considered one of the more valuable rose species for pollinator forage.

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.