Sweetunia Black Satin - Petunia

Sweetunia Black Satin is a named petunia whose flowers were recorded as purple in Penn State’s 2023 flower trial, despite the dark color suggested by its trade name. The trial measured plants about 10 inches tall and 35 inches wide, making this a useful choice where a broad, spreading display has room. [Penn State Flower Trials](https://agsci.psu.edu/flower-trials/trial-year/2023/plant-name/petunia-sweetunia-black-satin) ## Placement and growing conditions Use the selection in a sunny container or bed with enough horizontal space for its mature spread. Petunias grow best in full sun and moist, well-drained soil; they tend to flower poorly in very heavy soil. Water according to conditions and container size, keeping the root zone moist while allowing excess water to drain. Petunias are half-hardy annuals in Illinois and are generally grown as seasonal color where frost occurs. [University of Illinois Extension: Petunia](https://extension.illinois.edu/flowers/petunia) ## Maintenance Check containers frequently during hot or windy weather, when they dry faster than garden beds. Occasional late-season pinching can keep growth compact and support continued flowering.