Aster Milady Lilac Dwarf Callistephus Chinensis is a popular, low-growing annual plant. Aster Milady seeds are easy to grow, and they germinate quickly. This dwarf aster grows only 10 inches tall and blooms profusely with showy, large, double-flowered, lilac flowers. Aster Milady blooms for months all summer and fall long until frost, and its charming, fragrant flowers attract butterflies and bees.