Blue Star Amsonia
Amsonia montana
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Perennial
Height
24 inches
Width
24 inches
Light
Full Sun, Partial Sun
Zones
4, 5, 6, 7, 8, 9
Water
Moderate, drought-tolerant once established
Humidity
Average
Lifespan
Perennial
Native To
North America
Toxicity
Toxic if ingested; sap may cause skin irritation
The Story
Plant Bio
Amsonia montana, commonly known as Mountain Bluestar, is a perennial shrub with slender, arching stems, narrow green foliage, and clusters of star-shaped, pale blue flowers that bloom in late spring to early summer. This species is appreciated for its drought tolerance, attractive fall foliage, and its ability to thrive in partial shade, making it a versatile choice for woodland gardens and borders.
Bloom Period:
Uses & Benefits:
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, then drought-tolerant
- Provide full sun for optimal growth
- Divide every 3–4 years in early spring or fall
- Mulch to retain moisture and suppress weeds
- Prune lightly after flowering to maintain shape
Pro Tip
Ensure good drainage to prevent root rot and promote healthy growth.
Keep It Thriving
Care Guide
Do
- Water during dry spells 🌱
- Prune back after flowering
- Divide every few years for rejuvenation
- Apply mulch to conserve moisture
Don't
- Overwater to avoid root rot ❌
- Skip pruning after flowering
- Plant in heavy clay soils without amendment
- Neglect to remove dead or damaged stems
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
Companion Plants
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 4–9. 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 late spring through late fall. 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.
More Amsonia to compare
Storm Cloud Blue Star
Amsonia tabernaemontana 'Storm Cloud'
Arkansas Blue Star
Amsonia hubrichtii
Blue Star Amsonia
Amsonia tabernaemontana 'Blue Star'
Bluestar
Amsonia tabernaemontana
Blue Ice Amsonia
Amsonia orientalis 'Blue Ice'
Blue Ice Bluestar
Amsonia tabernaemontana 'Glacier Blue'
Keep exploring
Explore the genus
Collections featuring this plant
Grow Blue Star Amsonia with confidence
See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.
