Threadleaf Amsonia, String Theory

$24.99

Outdoor Plant Size

Back for the 2026 season.

String Theory Blue Star has clusters of sky blue star-shaped flowers at the ends of the stems from late spring to early summer, which are interesting on close inspection. The flowers are excellent for cutting. Its narrow leaves are dark green in color. As an added bonus, the foliage turns a gorgeous harvest gold in the fall.

Mature Height: 24 - 36"

Mature Spread: 18 - 24"

Sunlight Exposure: Sun, Partial

Water Needs: Moderate

We want you to be completely satisfied with your purchase and confident in your gardening experience. Plants in healthy condition may be returned within 14 days of purchase for a full refund. Non-plant items may also be returned within 14 days if unused and in original packaging. A receipt is required.

Please Note: Images on our website or tags may show plants at full maturity or in bloom. Actual plants may vary in size, maturity, and seasonal appearance at time of purchase.

We want you to be completely satisfied with your purchase and confident in your gardening experience. Plants in healthy condition may be returned within 14 days of purchase for a full refund. Non-plant items may also be returned within 14 days if unused and in original packaging. A receipt is required.

Please Note: Images on our website or tags may show plants at full maturity or in bloom. Actual plants may vary in size, maturity, and seasonal appearance at time of purchase.

Plant Profile

Threadleaf Amsonia, String Theory

Sunlight Exposure

Sun, Partial

Water Needs

Moderate

Landscape Use

Border, Accent

Growth Rate

Moderate

Growth Shape

Clumping

Flowering Season

Spring

Foliage Color

Green

Season of Interest

Spring, Fall

Fall Color

Copper-Brown-Bronze

Winter Foliage

Deciduous

Chalet Quality Guaranteed

Each plant is carefully selected by our horticultural experts to ensure top quality, health, and beauty—bringing the best of nature to your home

Local Delivery

Our local delivery service brings plants right to your doorstep, with expert care to ensure they arrive healthy and thriving.

Need Help?

You can make an appointment with our plant specialist for your next visit to our store, or email us.