Rosa multiflora var. adenochaeta ("Tsukushiibara")

Japanese name: ツクシイバラ （筑紫茨）
Scientific name: Rosa multiflora var. adenochaeta

[Overview]
A deciduous shrub 1.5–2 m tall, found in sunny places from lowlands to mountains, and common on bright riverbeds.
The stems branch well, at first growing upward and later spreading sideways in an arch; the branches have prickles that are gently hooked or erect.
The leaves are alternate and odd-pinnately compound, 10–18 cm long, with 7–9 leaflets.
The leaflets are obovate-oblong, 3–5 cm long, with a slightly glossy upper surface, and the leaf axis bears glandular hairs and small prickles.
The leaf margin has teeth.
A characteristic feature is that the stipules are deeply and finely pinnately divided like the teeth of a comb and have glandular hairs.
Panicles at the branch tips bear many pale pink, 5-petaled flowers 2.5–4 cm across.
Reddish glandular hairs grow densely on the outside of the inflorescence axis, flower stalks and sepals.
The fruit is ovoid-spherical, 0.7–1 cm across, ripening red and remaining until late autumn.

[Cultivation]
Propagate from seed or by cuttings.
It prefers fertile soil in a sunny, well-drained, well-ventilated place.
It is hardy and easy to grow.
It grows fast and, if left alone, spreads into a large clump, so space is needed.
For potted plants, water thoroughly when the soil surface dries; for plants in the ground, rainfall is sufficient unless summer brings a long spell of sunny weather and the soil dries out.
Apply organic fertilizer in winter, and apply slow-release fertilizer after flowering in spring.
Basically it is not pruned and is left to its natural form.
Pests and diseases include aphids, rose sawflies and longhorn beetles.

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