Amsonia hubrictii

Threadleaf Bluestar

A graceful, upright perennial prized for its fine, narrow foliage, sky-blue star-shaped flowers, and stunning golden fall color. Compared to some other bluestars, Amsonia hubrechtii tends to have a more upright, slender habit and holds its shape well in mixed borders.

Key features



Width: 12–18 in (1–1.5 ft)



Height: 24–36 in (2–3 ft)



Flower color: Pale sky blue



Bloom time: Mid to late spring



Foliage: Fine, needle-like green leaves that turn golden yellow in fall



Life cycle: Herbaceous perennial



Growing conditions



Sun: Full sun to light shade



Soil: Well-drained; adaptable to average and loamy soils



Water: Moderate; drought tolerant once established



Hardiness: USDA Zones 4–9



Landscape use



Front to mid-border perennial beds



Mass plantings and meadow-style plantings



Pollinator and native gardens



Cottage and informal borders



Notes



Excellent fall foliage color (bright golden yellow)



Good deer and rabbit resistance typical of bluestars



Upright, tidy habit makes it easy to pair with grasses, coneflowers, and asters



Generally low maintenance once established

Plant type

Perennial

Height

15-18"

Width

3'

Hardiness zones

5–9

Sunlight

Full Sun, Partial Shade

Growth rate

Moderate

Bloom time

Late Spring, Spring

Flower color

Blue

Leaf color

Green

Fall color

Yellow

Attracts

Butterflies

Soil

Heavy, Loamy, Well Drained

Fruit

Yes

Fragrant

Yes

Drought tolerant

No