Rubus macrocarpus Benth.
Rubus stipularis Benth.
Common Name: Giant Colombian Blackberry
Rubus nubigenus is a deciduous shrub producing each year a cluster of scrambling, prickly, biennial stems from a woody rootstock; the stems can grow 2 metres or more long. The stems only produce leaves, and do not flower, in their first year of growth; forming flowering branches in their second year and then dying after fruiting.
The plant is cultivated at higher elevations in Peru and Colombia, and occasionally elsewhere, for its edible fruit[
S. America - Bolivia, Peru, Ecuador, Colombia.
Found at elevations between 2,600 - 3,400 metres[
|Other Uses Rating||
|Cultivation Status||Cultivated, Wild
A plant of tropical, highland climates, it also has potential for growing in subtropical and temperate areas.
Easily grown in a good well-drained loamy soil in sun or semi-shade[
Attempts to grow this species outside its natural range have met with failure[
Plants in this genus are notably susceptible to honey fungus[
Fruit - raw or cooked[
]. A loganberry-like flavour[
]. This species has probably the largest fruit of the genus, it is up to 50mm long and 25mm wide - fruits as large as a hen's egg have been seen[
This species is of interest in breeding programmes because of the large size of its fruits[
A purple to dull blue dye is obtained from the fruit[
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 in a frame[
Tip layering towards the end of the growing season
Division just before the plant comes into new growth or as it enters dormancy[
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