Blackcurrant can damage both unopened and open flowers when the temperature falls below . The flowers at the base of the strig are more protected by the foliage and are less likely to be damaged. In midsummer the strigs of green fruit ripen to edible berries, very dark purple in colour, almost black, with glossy skins and persistent calyxes at the apex, each containing many seeds. An established bush can produce about 4.5 kilograms (10 pounds) of fruit each year. Plants from Northern Asia are sometimes distinguished as a separate variety, "Ribes nigrum" var. "sibiricum", of which "Ribes cyathiforme" is considered
Ribes americanum sedge meadows ("Carex" spp.). It grows on plains and in mountains and sometimes in disturbed areas such as roadsides. It is shade-tolerant, growing in the understory of closed-canopy woodlands and forests. This plant is an alternate host for the white pine blister rust ("Cronartium ribicola"), the vector of a pine tree disease. It is sometimes eradicated in attempts to control the rust. The fruit of this plant is known for being made into jam and jelly. It has also been introduced to northern China. Ribes americanum Ribes americanum is a North American species of flowering plant in the gooseberry family