Jostaberry
Ribes x culverwellii

R. x culverwellii is a blackcurrant x gooseberry hybrid. It is a fruiting shrub with green leaves and heavy crops of black, rounded, sweet berries in summer.

Propagation - seeds

Best sown as soon as it is ripe in the autumn in a cold frame. Stored seed requires 3 months cold stratification at between 0 and 5°c and should be sown as early in the year as possible.

Propagation - Cuttings

Cuttings of half-ripe wood, 10 - 15cm with a heel, mid summer in a frame. Cuttings of mature wood of the current year’s growth, preferably with a heel of the previous year’s growth, autumn - mid-winter in a cold frame or sheltered bed outdoors.