Rubus trifidus

Family: Rosaceae

What it is like

Rubus trifidus is an evergreen Shrub growing to 2 m (6ft 7in). See above for USDA hardiness. It is hardy to UK zone 6. It is in leaf all year, in flower in May. The species is hermaphrodite (has both male and female organs) and is pollinated by Insects. Suitable for: light (sandy), medium (loamy) and heavy (clay) soils and prefers well-drained soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers moist soil. The plant can tolerate maritime exposure.

Height (m): 2

Where it is found

By the shore in the warmer areas of C. Japan.

E. Asia - Japan.

Conservation Status:

Countries/locations it is found in

How it is used

Food

Rating: 2

Fruit - raw or cooked. A grateful taste.

Medicine

Rating: 0

Other

Rating: 1

A purple to dull blue dye is obtained from the fruit.

Dye: Plants that provide dyes.

How it is grown

Easily grown in a good well-drained loamy soil in sun or semi-shade. Plants are evergreen when grown in a sheltered woodland. Often cultivated for its edible fruit in Japan, plants do not flower very freely in Britain. Plants have perennial stems that are thornless. Plants in this genus are notably susceptible to honey fungus.

Propagating it: Seed - requires stratification and is best sown in early autumn in a cold frame. Stored seed requires one month stratification at about 3°c and is best sown as early as possible in the year. Prick out the seedlings when they are large enough to handle and grow on in a cold frame. Plant them out into their permanent positions in late spring of the following year. Cuttings of half-ripe wood, July/August in a frame. Tip layering in July. Plant out in autumn. Division in early spring or just before leaf-fall in the autumn.

Best place to grow: Woodland Garden Sunny Edge;

Habit: Shrub

Hardiness: 5-9

Growth:

Soil: Light (sandy), medium, heavy (clay)

Shade: Semi-shade, no shade

Moisture: Moist

Things to keep in mind

Its other names

Local names

Synonyms

R. hydrastifolius.