Aster Milady Blue Dwarf Callistephus Chinensis is a half-hardy annual aster. Aster Dwarf Milady Blue is easy to grow from seeds, and this dwarf variety grows only 10 inches tall blooming with large, fully-double, chrysanthemum-type, blue flowers on sturdy stems. Aster Milady blooms over a long period from early summer until the first frost, and its showy, fragrant flowers attract butterflies and bees.