Although the Horned Violas are defined as tender perennials or biennials, generally they behave as annuals. C. cornuta cultivars can be started from seed right in the garden, sown immedately after last frost. Similar to pansy, they bloom late winter and throughout spring, then quiet down in summer when they may need some pluck-thinning and pinching back in order to produce a second flourish of bloom in autumn.