|The Comet Series cultivars are small and early bloomers, producing abundant, double flowers in wide color palette. This fast grower originally found it's home on rocky slopes and poor soils in China. Slightly resembling a chrysanthemum, the flowers may be either single or double in shades of purple, blue, rose, white, and sometimes yellow. Taller cultivars will require staking. This plant will thrive in neutral to alkaline soil that is well drained and sunny. For a longer season of bloom, deadhead. Easily started from seed when soil temperatures are above 60 degrees.