Last fall I pruned my my black currants shrub tried planting some cutting. I had to much so I put some in a mulch pile with some cardboard on top, 8 month later some currants grew out off the cardboard very vigirously more then 2 feets !!!
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Rebecca Norman
gardener
Posts: 2573
Location: Ladakh, Indian Himalayas at 10,500 feet, zone 5