Saw a silver washed fritillary in the garden yesterday, now hunting dog violets in case it is looking for an ovipositing site...
They are fully to half hardy and should be grown in the sun or shade in well drained but moisture retentive soil; a few species prefer acid soil. They will appreciate shelter from the drying winds.
Sow seeds in autumn or spring or by division of clumps in autumn.
Pests, diseases or disorders
Snails and slugs may be problematic.