Saw a silver washed fritillary in the garden yesterday, now hunting dog violets in case it is looking for an ovipositing site...
They will tolerate light frosts, You should grow them in cool, moist areas, They will appreciate shelter from the drying winds. You can propagate from seeds in late winter or early spring, or perennial species by division or from cuttings.
You can propagate by division.
Pests, diseases or disorders
Protect from slugs and greenfly