Is Ribes nigrum frost tolerant?
Ribes nigrum is a deciduous Shrub growing to 1.8 m (6ft). See above for USDA hardiness. It is hardy to UK zone 5 and is not frost tender. It is in leaf from March to November, in flower from April to May, and the seeds ripen from July to August.
What is the PMID for Ribes nigrum (black currant)?
PMID 16719528. ^ Mcdougall, G. J.; Gordon, S.; Brennan, R.; Stewart, D. (2005). “Anthocyanin-flavanol condensation products from black currant (Ribes nigrum L.)”.
Is Ribes rubrum Hardy in UK?
Western Europe, including Britain. Ribes rubrum is a deciduous Shrub growing to 1.2 m (4ft). It is hardy to zone (UK) 5 and is not frost tender. It is in flower from April to May, and the seeds ripen from July to August. The species is hermaphrodite (has both male and female organs) and is pollinated by Bees. The plant is self-fertile.
What are the new cultivars of Russell nigrum?
New cultivars such as ‘Crusader’, ‘Coronet’ and ‘Consort’ have been developed there by crossing R. nigrum with R. ussuriense and these show resistance to the disease. However the quality and yield of these varieties are poor as compared to non-resistant strains and only Consort is reliably self-fertile.