- Herbaceous perennial
- USDA hardiness zones:
- Full sun to part shade
Tender perennial that is winter hardy to USDA Zones 10-11. In St. Louis, it is grown as an annual. Performs well in average, medium moisture, well-drained soils in full sun to light shade. Tolerates poor soils as long as drainage is good. Although many petunias may be grown from seed sown indoors 10-12 weeks before last frost date, many gardeners search local nurseries for interesting cultivars in inexpensive cell/six packs and only resort to seed in situations where a specific cultivar is sought that is only available from seed. Purchased plants often benefit from pinching at the time of planting. Prompt deadheading of spent flowers promotes more rapid formation of new buds. Cut back plants that become leggy. If plants decline in the heat of summer, cut back to stimulate later bloom. Favorite or unique plants may be overwintered indoors in bright cool location. Most hybrids do not come true from seed.
Size and growth:
- 0.75 to 1.0 foot
- 1.0 to 3.0 feet
Bloom / flowers:
- May - To frost
- All colors except brown and black
Lavender, Blue, Showy flowers, Humming birds, Birds, White, Fragrant flowers, Annual, Yellow, Pink, Green, Red, Orange, Butterflies, and Purple
Beds, borders, edging, or ground cover. Containers, window boxes, hanging baskets. Winter houseplant for sunrooms.
No serious insect or disease problems. Susceptible to root rot, gray mold, late blight and tobacco mosaic virus. Watch for aphids, flea beetles, slugs and snails.