Henry™ I Blue Aster

Henry™ I Blue is a blue color variety in Syngenta’s Henry™ I series of New York asters. Its North American product profile identifies it as Aster novi-belgii 70018145, with double flowers, medium vigor, full-sun exposure, and a fall garden season ([Syngenta Flowers](https://www.syngentaflowers.com/ams/product/flower/70018145)). ## Form and Placement Syngenta lists a garden height of 16–18 inches and a spread of 20–24 inches. The breeder also describes the crop as very early-season in production; gardeners can use the separate fall flowering listing when planning seasonal color. Plant it in a sunny border or container where its blue double flowers are visible. ## Growing Conditions Provide full sun; New York asters also grow in partial shade. Species-level guidance recommends moist, well-drained soil and good air circulation to reduce foliar problems ([University of Illinois Extension](https://extension.illinois.edu/flowers/new-york-aster-michaelmus-daisy)). ## Maintenance Water consistently during active growth and flowering, with free drainage around the roots. Remove spent stems after the fall display. If grown as a perennial, divide crowded clumps periodically to maintain vigor and manage spread.