Astrantia Masterwort Purple Astrantia Major is a clump-forming perennial plant that belongs to the Apiaceae family. Astrantia flower seeds are often started indoors and transplanted to a desirable area after last frost. Masterwort produces unique flowers that are deep purple-red in color and unusual in shape, because its flowers appear as compound umbels that are surrounded by papery bracts. Astrantia starts to bloom in late spring and blooms repeatedly through summer and even into fall attracting butterflies and bees.
