Will over winter in climates as cold as USDA Zone 4.) 4" - 8" tall. Sun or light shade. Blooms spring to early summer and in fall, depending on when seed is sown. 'Johnny-Jump-Up' has petite purple and yellow flowers. A classic Viola, nothing is as charming as a patch of them poking their heads above the snow. Violas bloom best during cool weather. When the weather warms up in summer, they tend to get ragged, stretched out, and slow down blooming. They can be sheared back at that time to promote a second period of bloom again the fall, but most gardeners start with fresh plants each season for the best results. Violas also readily reseed, so replanting may be unnecessary. In cold climates, sow in early spring for spring and early summer bloom. Or sow in summer for fall and spring bloom (plants will over winter). In warm climates, sow in late summer for fall, winter, and spring bloom. Flowers are edible and make a colorful addition to salads. Spring blooming Violas make a nice accent for your spring bulbs.