Amsonia hubrichtii

threadleaf blue star

Hubricht's amsonia

Arkansas amsonia

Outstanding Qualities

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 Plant Combinations: Miscanthus sinensis ‘Variegatus’, Heptacodium miconioides, Geranium ‘Ann Folkard’, Aster divaricatus, Campanula lactiflora ‘Prichard’s Variety’

Great Color Contrasts: yellow, white

Great Color Partners: blue, green, pink, purple

Culture Notes

This 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

Quick Facts

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