Wetern Blackcurrant
Ribes petiolare

Family: Grossulariaceae

What it is like

Ribes petiolare is a deciduous Shrub growing to 1.5 m (5ft). See above for USDA hardiness. It is hardy to UK zone 3. 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.

Height (m): 1.5

Where it is found

River islands, river alluvium and stony banks, riverain deciduous forest strips and edges in N. Asia. Moist places, 900 - 1500 metres from California to Washington and Montana.

N. Europe, N. Asia to Western N. America.

Conservation Status:

Countries/locations it is found in

How it is used

Food

Rating: 3

Fruit - raw or cooked. The fruit is large and abundantly produced. Highly esteemed. The fruit is about 10mm in diameter. Unlike most blackcurrants, it is not aromatic.

Medicine

Rating: 0

Other

Rating:

How it is grown

Easily grown in a moisture retentive but well-drained loamy soil of at least moderate quality. Plants are quite tolerant of shade though do not fruit so well in such a position. Hardy to about -20°c. This species could be useful in breeding programmes for blackcurrants. Plants can harbour a stage of 'white pine blister rust', so they should not be grown in the vicinity of pine trees. Plants in this genus are notably susceptible to honey fungus.

Propagating it: Seed - best sown as soon as it is ripe in the autumn in a cold frame. Stored seed requires 3 months cold stratification at between 0 and 5°c and should be sown as early in the year as possible. Under normal storage conditions the seed can remain viable for 17 years or more. Prick out the seedlings into individual pots when they are large enough to handle and grow them on in a cold frame for their first winter, planting them out in late spring of the following year. Cuttings of half-ripe wood, 10 - 15cm with a heel, July/August in a frame. Cuttings of mature wood of the current year's growth, preferably with a heel of the previous year's growth, November to February in a cold frame or sheltered bed outdoors.

Best place to grow: Woodland Garden Sunny Edge; Dappled Shade;

Habit: Shrub

Hardiness: 3-7

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. hudsonianum petiolare. (Dougl.)Jancz. R. dikuscha. Fisch.