Because of the extreme vigour of the Jostaberry, I have used it to bud-graft gooseberries on to as standards. So far I’ve managed the gooseberries Captivator and Invicta grown on as standards.
Jostaberry, like the equally vigorous Ribes aureum, will manage four or five foot stems for standards from cuttings taken in early spring and grown on through summer outside and following winter in greenhouse to bud graft in March.
It suckers far less than Ribes aureum which is usual root-stock for grafted gooseberries. Has anyone else tried this?