threadleaf blue star
In late spring and early summer a constellation of powdery sky-blue flowers burst forth atop the fine feathery foliage of Amsonia hubrichtii. Thread-leaf bluestar has thin, light green needle-like foliage. As these long-lived and reliable plants mature in midsummer they give the impression of billowing clouds melding with the surrounding landscape. One of the best perennials for fall color, it shines with a radiant bright yellow color before going dormant for the winter.
Colors & Combos
Great Color Contrasts: yellow, white
Great Color Partners: blue, green, pink, purple
Culture NotesThis long lived perennial prefers a rich well-drained soil and regular summer watering. Plant it in full sun for the best flowering and brightest fall color. Be patient with new young plants, often they can look a little straggly and forlorn and may take a few years to fill out. To help plants establish give them some space to minimize competition. Once they mature they will be long lived and robust, full specimens.
© Richie Steffen / Great Plant Picks
Plant Type: perennial
Foliage Type: deciduous
Plant Height: 3 ft. 0 in. (0.91 m.)
Plant Width/Spread: 3 ft. 0 in. (0.91 m.)
Hardiness: USDA Zones 5 to 8
Flower Color: blue
Sun/Light Exposure: full sun
Water Requirements: regular watering