Arkansas blue star
Amsonia hubrichtii Woodson
Also called threadleaf blue star.
Feathery, needle-leaved perennial with pale blue spring stars and outstanding golden fall colour. Shrub-like by its third year.
Size over time
Typical landscape size 0.6–0.9 m (2–3 ft) tall and 0.9–1.2 m (3–4 ft) wide; slow growth, about 4 years to maturity. Intermediate sizes use the planner’s growth curve (k = 0.12) from the #1 install size.
Bloom
Pale blue flowers, May (northern-hemisphere months; timing shifts with region and season).
| Plant | J | F | M | A | M | J | J | A | S | O | N | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Arkansas blue star : May |
Design notes
- Slow to fill in — space for the mature size.
- Cut back to 30 cm after bloom if it flops in part shade.
Regions
Native range: Arkansas and Oklahoma.
Not recorded as native to any of the three pilot regions.
Native status describes where the species occurs naturally. It is not a promise that it suits a particular garden; site conditions decide that.
Related plants
Plan with Arkansas blue star
Place it in a design, check it against your zone, light and moisture, and see it at year three and year ten.