The Journal of Horticultural Science & Biotechnology
Vol. 37 No: 2
Propagation of Black Currants from Single-Bud Cuttings
G.G. THOMAS and E.H. WILKINSON
Black currants are readily propagated from single-bud hardwood cuttings approximately 1 inch long, with the bud at the top and planted vertically. The best part of the shoot from which to take such cuttings is the lower-mid portion (buds 15–22).
Optimum rooting is obtained from cuttings planted in January, February and March after dormancy has broken in the field, but by using 24-hour day-length successful rooting can be extended from October to March. The emergence of flowers in March-planted cuttings slightly reduces rooting.
Thirteen commercial varieties have been propagated successfully by this method.
Suitable softwood and semi hardwood cuttings are available when the current season's shoots are 12 nodes or more in length, i.e. normally in late April. When these are planted in a propagation frame with soil heating, good rooting is obtained from April to June provided the subtending leaf is retained during the rooting period.
Twenty-four-hour day-length increases the rooting of cuttings planted in July; lack of rooting after July is attributed to early leaf abscission, the initiation of flowers and the onset of dormancy.
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