Smokey dahlias, like most dahlia varieties, are typically planted in the spring once the soil has warmed up and the danger of frost has passed. In most regions, this is usually between late April and early June, depending on the local climate. In areas with a warmer climate (such as USDA zone 8 or higher), it is possible to plant the dahlia tubers earlier in the season.
It's important to wait until the soil has warmed up to at least 60°F (15°C) to ensure successful growth and development of the tubers. Smokey dahlias prefer well-draining soil and full sunlight, so it's important to choose a planting location that meets these requirements. With proper care and maintenance, Smokey dahlias can bloom from mid-summer through fall, adding a splash of color to any garden or landscape.