Viola odorata carries more cultural weight than most garden perennials. Native to Europe and western Asia, it was the flower of Shakespeare and the scent behind Parma violet candies, liqueurs, and some of the most enduring perfumes ever made. Small, heart-leaved rosettes spread by long stolons to colonize new ground, and in the right conditions that habit can cross into weedy; worth bearing in mind before planting near a formal bed.

Grown in moist, well-drained soil with partial shade or dappled sunlight, sweet violet produces blue-violet flowers in spring that combine a sweet, almost vanillic fragrance with genuine garden charm. Prune away runners and weak growth in late fall to encourage a tidier, more floriferous spring display. It performs well in containers, cottage gardens, and sensory plantings, and the flowers are fully edible, used candied or fresh as garnish. Deer tend to avoid it, though slugs, spider mites, and powdery mildew occasionally make their presence known.