Amsonia Hubrichtii Blue Staror

Amsonia Hubrichtii Blue Staror

Amsonia Hubrichtii Blue Star

Native to Arkansas, Amsonia hubrichtii (Narrowleaf Bluestar) is an erect, clump-forming perennial which provides 3 seasons of interest with its starry blue flowers in spring, its bright green summer foliage and its charming fall color. This Blue Star features loose terminal clusters, up to 5 in. long (12 cm), of delicate, pale blue, star-shaped flowers born on upright stems in late spring - early summer. They rise above a graceful foliage of soft-textured, needle-like, bright green leaves that pleasantly colors up to bright golden-yellow in fall. It makes an excellent backdrop for fall-blooming perennials such as sedums and garden mums.


Amsonia hubrichtii was the Perennial Plant Association’s plant of the year 2011. This southern native was “discovered” in Arkansas in 1942 by an assistant to a botanist at the Missouri Botanical Garden – Mr. Leslie Hubricht, for whom it is named. It actually had been collected previously, but had been misidentified as A. ciliata var. filifolia. Commonly called Arkansas blue star or thread-leaf blue star, this member of the dogbane family (Apocynaceae) grows naturally in fields, dry, rocky outcrops and well-drained creek banks and bottomlands of Arkansas. At a height of 24 to 36", Amsonia hubrichtii looks best as a backdrop for shorter perennials. Its designation as the Perennial Plant of the Year for 2011 indicates that it's not only attractive, but also adaptable and easy to grow in a variety of garden situations. The tall stems sport feathery foliage and are topped in late spring or early summer by pale blue, star-shaped flowers. In fall, the foliage turns a brilliant yellow. The plant prefers full sun to part shade and moist, rich soil. Cut stems back by about a third after flowering to prevent flopping, a common occurrence if planted in too shady a spot.

century Virginia physician, Dr. Charles Amson. It is native primarily to North America with one species in East Asia and another in the eastern Mediterranean. This article will focus on those species native to the U.S. This clump-forming perennial has narrow, alternate leaves and clusters of blue, 5-petaled flowers. The light blue flowers are followed by elongated, pod-like fruits containing hard, black seeds which can be used for propagation. Amsonia offers three-season interest: showy, long-lasting blooms in spring (mostly in May); threadlike green foliage in summer; and yellow foliage in fall. Although it prefers moist, loamy soil, this plant can be grown in most well-drained soils, tolerating clay soils very well. Once established, it is drought resistant. Amsonia thrives in full sun to part shade. When grown in full sun, plants often require no pruning or staking. When grown in partial shade and/or in rich soils, plants tend to become more open and floppy and often require staking or pruning. Full sun promotes a brighter golden foliage color in the fall. Shade protection from the midday sun in hot climates promotes longer-lasting blooms. For a neater appearance, particularly for shade-grown plants, consider cutting back stems by 1/2 to 1/3 after flowering to promote bushy growth and a more rounded foliage mound. The dwarf cultivars do not require staking or cutting back. Moderately drought-tolerant once established, this is a low maintenance, easy-to-grow, long-lived plant not subject to disease or pest problems. (Source: piedmontmastergardeners.org)


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