In winter apply sulphate or potash at a rate of 35g/sq m and in spring nitrogenous fertilizer at the same rate. Mulch well in spring all around every bushes with well-rotted manure, compost or leaf mold to conserve soil moisture. Water them regularly in dry weather but not on the period when the fruits are ripening because this may cause the skins to split.
Propagate redcurrants and whitecurrants by taking hardwood cuttings in early autumn, using shoots of 30-40 cm long. Remove all but the top three or four buds to produce plants with short stems. Insert the cuttings in fertile, moist soil, burying them by about half their length and firm well around them. Once they have rooted you can transplant them into their final position.