Petunia, Mexican

Winter hardy to USDA Zone 8 (marginally hardy in Zone 7 with protection and mulch) where it is best grown in medium to wet soils in full sun to part shade. Best flowering is in full sun. This plant thrives in moist, fertile, humusy but well-drained soils. It is a versatile plant that tolerates an extremely wide range of growing conditions. It thrives as a marginal water plant and in boggy soils. It also does well in average garden soils with even moisture. Established plants have respectable drought tolerance. Plants also tolerate high heat and humidity. Cut back stems after flowering to encourage new flowers. Plants will spread by rhizomes and self-seeding in the garden, and have escaped gardens and aggressively naturalized in parts of the southeastern U.S.