Small clusters of light blue star-shaped flowers.

Amsonia hubrichtii

Hubricht's Blue Star, Threadleaf Bluestar

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Threadleaf Bluestar is a perennial plant cherished for its fine, feathery foliage and clusters of striking blue flowers.

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The feathery, thread-like leaves of Amsonia hubrichtii form a graceful mound, and during the growing season, they provide an airy, fern-like texture to the garden. In late spring to early summer, this plant produces clusters of small, five-petaled, powder-blue flowers, which create a stunning contrast with the fine green foliage. As autumn approaches, the foliage transitions to a brilliant golden-yellow, adding a second layer of visual interest to the garden.

Hubricht’s Bluestar is known for its low-maintenance characteristics. It’s adaptable to a variety of soil types and light conditions, though it thrives in full sun to partial shade. Its resilience, drought tolerance, and resistance to deer make it a dependable choice for gardeners. Additionally, it attracts pollinators like butterflies and bees, contributing to a thriving garden ecosystem. Use this as a border plant, in mixed perennial beds, or as a standout specimen.

Plant Details:

Other Common Names: Threadleaf Blue Star

Plant Type: Flower, Perennial

New Jersey Native: No

Bloom Times: Spring

Bloom Colors: Blue

Deer Resistance: High

Attracts Pollinators and Wildlife: Butterflies

Salt Tolerance: Unknown

Hardiness Zone: 6a, 6b, 7a, 7b

Physiographic Region: All Regions in NJ

Soil Characteristics

Soil Type: Loam, Sandy, Clay

Soil Moisture: Dry, Moist

Soil pH: Slightly Acidic, Neutral

Light Needs of Plant

Optimal Light: Full Sun

Light Range: Full Sun, Partial Shade

Water Needs of Plant

Soil Moisture: Dry, Moist

Drought Tolerance: High

Size and Growth Rate

Height: 2 - 3 ft

Spread: 2 - 3 ft

Growth Rate: Medium