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 triste June and July. The fruit is a bright red berry, without the hairs that some currants have. The fruit is edible but rather sour. It is listed as endangered in Connecticut and Ohio, and as threatened in Pennsylvania. Ribes is listed a plant pest in Michigan and the planting of it in certain parts of the state is prohibited. Alaska Natives use the fruit as food, eating it raw, and making the berries into jam and jellies. Eskimos eat the berries and the Inupiat eat them raw or cooked, mix them with other berries which are used to make a