They bloom from spring until frost. Many petunias, especially white and lavender cultivars have a very sweet fragrance. They can be used for color masses, borders, containers, hanging baskets or as a seasonal groundcover. Petunias should be planted in full sunlight. They will become spindly and have few flowers if grown in shade.
Petunias grow well in most soils.
Best growth occurs in well-drained, light soil of medium fertility. If the soil or the area is poorly drained, you can build raised beds to grow good petunias. They prefer soil with a pH of 6.0 to 7.0. If you grow petunias from seed, start them eight to 10 weeks before planting in beds. The very fine dustlike seed of petunias require light for germination.