Seed - best sown as soon as it is ripe in a cold frame. Stored seed requires 2 months cold stratification and should be sown as soon as possible in a cold frame. When they are large enough to handle, prick the seedlings out into individual pots and grow them on in the greenhouse for at least their first winter. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts.
Deci, se poate inmulti si prin seminte.