60-90 Days to maturity. Callistephus chinensis. Colour Carpet China Aster Seeds. Non-GMO, ornamental, annual, open-pollinated flower. Colour Carpet China Aster flower garden seeds grow an adorable dwarfed aster plant ideal as an annual ground cover or as a low-growing bedding plant. The low, upright clumping habit is unique among asters and makes for a wonderful addition to containers, beds, and walkways. The fully double blooms are breathtaking when in full bloom from summer through fall. Approximately 1,200 seeds/oz.