perennial

Blue Star Amsonia

Amsonia ciliata

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Perennial

Height

24 inches

Width

24 inches

Light

Full Sun, Partial Sun

Zones

5, 6, 7, 8, 9

Water

Moderate, drought tolerant once established

Humidity

Prefers average humidity

Lifespan

Perennial

Native To

North America

Toxicity

Sap can cause skin irritation; low toxicity if ingested.

The Story

Plant Bio

Amsonia ciliata, commonly known as Bluestar, is a deciduous perennial with slender, arching stems and narrow, blue-green foliage that forms dense clusters. It produces star-shaped, pale blue flowers in late spring to early summer. This species is prized for its exceptional drought tolerance, vibrant fall foliage display, and its ability to attract pollinators such as butterflies and bees.

Uses & Benefits:

Provides airy blue flowers that attract pollinators, adding delicate texture to gardens.

Drought tolerant and low-maintenance, ideal for water-wise gardens.

Supports native pollinators and birds, enhancing local biodiversity.

Marketplace

Where to Buy

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Planting

How to Grow

Tuck seeds into well-draining soil in early spring.
Water regularly until established, about 6 weeks.
Place in full sun for best flowering.
Fertilize lightly in spring with a balanced fertilizer.
Prune back in late winter to promote healthy growth.
Divide clumps every 3-4 years in early spring.

Pro Tip

Ensure well-draining soil and full sun for optimal growth.

Keep It Thriving

Care Guide

Do

Water during dry spells 🌱
Prune in late winter to shape and promote new growth
Mulch to retain soil moisture

Don't

Overwater to prevent root rot ❌
Avoid heavy fertilization which can reduce flowering
Don’t prune in late summer or fall

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Prune
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Airy border plantPerennial bed fillerWildflower meadow accent

Companion Plants

Echinacea Rudbeckia Coreopsis Salvia Gaillardia

Multiply

Propagation Methods

Good to Know

Common Questions

Blue Star Amsonia questions

What zones can Blue Star Amsonia grow in?

Blue Star Amsonia is hardy in USDA Zones 5–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Blue Star Amsonia deer resistant?

Yes — Blue Star Amsonia is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Blue Star Amsonia bloom?

Blue Star Amsonia typically blooms in mid to late spring through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Blue Star Amsonia need full sun?

Blue Star Amsonia does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Blue Star Amsonia drought tolerant?

Yes — once established (usually after the first full season), Blue Star Amsonia handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.