The Facts Height: 0.5′ – 1.5′ Spread: 0.5′ – 1′ Sun: Full Sun Water: Medium Soil: Well Drained Growth Rate: Fast Dianthus has many varieties and in Oklahoma is split into perennial and annual. Depending on the winter, annual Dianthus can re-seed itself like its perennial cousin. More often than not, though, this is not the case. Half inch diameter bloom heads cluster together to form brilliant displays of color on green to gray green foliage. Its clumping habit helps lend it