Giant Colombian Blackberry
Rubus nubigenus
Family: Rosaceae
What it is like
Rubus nubigenus is a deciduous Shrub growing to 2 m (6ft 7in). The species is hermaphrodite (has both male and female organs) and is pollinated by Apomictic (reproduce by seeds formed without sexual fusion). The plant is self-fertile. 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): 2
Where it is found
Found at elevations between 2600 to 3400 metres.
S. America - Colombia.
Conservation Status:
Countries/locations it is found in
How it is used
Food
Rating: 3
Fruit - raw or cooked. A loganberry-like flavour. This species has probably the largest fruit of the genus, it is up to 5cm long and 2.5cm wide, fruits as large as a hen's egg have been seen.
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
We have very little information on this species and do not know if it will be hardy in Britain. It is often sold in local markets in Colombia and is occasionally cultivated. Attempts to grow it outside its natural range have met with failure. The following notes are based on the general needs of the genus. Easily grown in a good well-drained loamy soil in sun or semi-shade. 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: 0-0
Growth:
Soil: Light (sandy), medium, heavy (clay)
Shade: Semi-shade, no shade
Moisture: Moist