Arkansas Blue Star (Amsonia hubrichtii)

Common Name: Threadleaf Blue Star, Arkansas Blue Star, Arkansas Amsonia

Arkansas Blue Star (Amsonia hubrichtii) is a herbaceous perennial native to Arkansas and Oklahoma. It’s foliage is narrow and thread-like and grows in an upright, clump. In the fall, Arkansas Blue Star’s foliage changes from bright green to an unbelievable golden color. It is primarily cultivated for its light blue flowers.

Blue Star’s flowers are about a half an inch wide and star shaped as you may have guessed. Flowers bloom in late spring to early summer in 2-5 inch clusters on 3 foot tall stems.

Arkansas Blue star is easy to grow and generally does not have any pest or disease issues. It requires average, well-drained soil in sunny locations. The flowers will last longer if given afternoon shade, but its fall foliage color will be best in full sun. The stems will flop more with more shade. Cut the stems back to 6″ after flowering to help keep them upright and to shape the plants into a mound to show off the golden yellow fall color.

Plant if part sun to full sun 30-36″ apart. Grows 24-36″ wide and 24-36″ tall.

Arkansas Blue Star is available in our Premium Quart Native Perennial size category.

arkansas blue star amsonia Flower Close-up (Wake County, NC)-May Cathy Dewitt CC BY 4.0
Flower Close-up (Wake County, NC-May Cathy Dewitt CC BY 4.0
North Carolina Extension Gardener Plant Toolbox (
arkansas blue star amsonia fall color Photos courtesy of Walters Gardens, Inc.
Photos courtesy of Walters Gardens, Inc.
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