It’s nearly the end of February, there is still frost at night and some of the plants look shabby… Before I can see where the weeds are, I need to ‘tidy up’.…
They are fully to half hardy. They will require a rich soil that is kept moist, but it is well drained. They should be grown in full sun, but the roots will require shade and protection from too much heat.
You can propagate the cultivars in the early summer by softwood or semi-ripe cuttings or layering.
Pests, diseases or disorders