OK
In progress indicator

Amsonia orientalis (Eastern blue star)

Beginner
skill rating
1 hour care
per year
0.5m
Max height
0.3m
Max spread
2-5 years
To maturity
Low
Toxicity

Plant details

Botanical name

Amsonia orientalis

Other names

Eastern blue star, Rhazya orientalis

Genus

Amsonia Amsonia

Species

A. orientalis - A. orientalis is a clump-forming, woody-based, deciduous perennial with erect stems bearing narrowly lance-shaped, grey-green leaves and short, compact or loose panicles of pale blue to violet-blue flowers in summer.


Amsonia orientalis is: Deciduous

Habit

Clump-forming, Erect

Toxicity

Contact with the milky sap may cause skin irritation.

Flower

Pale-blue in Spring; Pale-blue in Summer

Foliage

Grey-green in Spring; Grey-green in Summer; Grey-green in Autumn

How to care

Watch out for

Pests

Generally pest free.

Diseases

Generally disease free.

General care

Pruning

Cut back in late autumn.

Propagation methods

Division, Seed, Softwood cuttings


Sign up for your FREE ACCOUNT today or login to receive detailed monthly care instructions

Where to grow

Amsonia orientalis (Eastern blue star) will reach a height of 0.5m and a spread of 0.3m after 2-5 years.

Suggested uses

Beds and borders, Cottage/Informal, Drought Tolerant, Prairie planting, Woodland

Cultivation

Grow in moist but well-drained soil preferably in full sun. Will tolerate some drought and light shade. May need staking if grown in partial shade.

Soil type

Chalky, Clay, Loamy, Sandy (will tolerate most soil types)

Soil drainage

Moist but well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Partial Shade, Full Sun

Aspect

North, South, East, West

Exposure

Exposed, Sheltered

UK hardiness Note: We are working to update our ratings. Thanks for your patience.

Hardy (H4)

Companion plants

We do not currently have companion plants added for this plant.

Botanical name

Amsonia orientalis

Other names

Eastern blue star, Rhazya orientalis

Genus

Amsonia Amsonia

Species

A. orientalis - A. orientalis is a clump-forming, woody-based, deciduous perennial with erect stems bearing narrowly lance-shaped, grey-green leaves and short, compact or loose panicles of pale blue to violet-blue flowers in summer.

Foliage

Deciduous

Habit

Clump-forming, Erect

Toxicity

Contact with the milky sap may cause skin irritation.


Colour

Flower

Pale-blue in Spring; Pale-blue in Summer

Foliage

Grey-green in Spring; Grey-green in Summer; Grey-green in Autumn


How to care

Watch out for

Pests

Generally pest free.

Diseases

Generally disease free.

General care

Pruning

Cut back in late autumn.

Propagation methods

Division, Seed, Softwood cuttings


Monthly care advice


Where to grow

Amsonia orientalis (Eastern blue star) will reach a height of 0.5m and a spread of 0.3m after 2-5 years.

Suggested uses

Beds and borders, Cottage/Informal, Drought Tolerant, Prairie planting, Woodland

Cultivation

Grow in moist but well-drained soil preferably in full sun. Will tolerate some drought and light shade. May need staking if grown in partial shade.

Soil type

Chalky, Clay, Loamy, Sandy (will tolerate most soil types)

Soil drainage

Moist but well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Partial Shade, Full Sun

Aspect

North, South, East, West

Exposure

Exposed, Sheltered

UK hardiness Note: We are working to update our ratings. Thanks for your patience.

Hardy (H4)

USDA zones

Zone 9, Zone 8, Zone 7, Zone 6, Zone 5, Zone 4, Zone 3

Defra's Risk register #1

Plant name

Amsonia orientalis (Eastern blue star)

Common pest name

Scientific pest name

Spilostethus pandurus

Type

Insect

Current status in UK

Absent

Likelihood to spread to UK (1 is very low - 5 is very high)

2

Impact (1 is very low - 5 is very high)

3

General biosecurity comments

Seed bug unlikely to pose a significant threat to UK plant health.

Defra's Risk register #2

Plant name

Amsonia orientalis (Eastern blue star)

Common pest name

Scientific pest name

Spilostethus hospes

Type

Insect

Current status in UK

Absent

Likelihood to spread to UK (1 is very low - 5 is very high)

1

Impact (1 is very low - 5 is very high)

3

General biosecurity comments

Seed bug unlikely to pose a significant threat to UK plant health.

About this section

Our plants are under greater threat than ever before. There is increasing movement of plants and other material traded from an increasing variety of sources. This increases the chances of exotic pests arriving with imported goods and travellers, as well as by natural means. Shoot is working with Defra to help members to do their part in preventing the introduction and spread of invasive risks.

Traveling or importing plants? Please read "Don't risk it" advice here

Suspected outbreak? Click here for contact details to report to the relevant authority.

Date updated: 7th March 2019 For more information visit: https://planthealthportal.defra.gov.uk/

In order to add a note on this plant, please add this plant to your plant lists.

In progress indicator
Full size image
In progress indicator
Caption

Caption

Cancel and close this form
In progress indicator
This plant likes... Garden match
Soil types: Chalky, Clay, Loamy, Sandy (will tolerate most soil types) Tell us...
Soil drainage: Moist but well-drained Tell us...
Soil pH: Acid, Alkaline, Neutral Tell us...
Light: Partial Shade, Full Sun Tell us...
Aspect: North, South, East, West Tell us...
Exposure: Exposed, Sheltered Tell us...
Hardiness: Hardy (H4) Tell us...

GARDENS WITH THIS PLANT

My Garden
My Garden
elizabeth bradbury

ARTICLES WITH THIS PLANT

The Wedgwood Garden

By London and Sussex based garden designer Jo Thompson. The Wedgewood Garden is a striking space for a strong, successful woman. read more

Piet Oudolf's Top 100 plants

Piet Oudolf is a world-famous garden designer, nurseryman and writer. In 2013, he singled out the 100 plants he won't do without and we have them all listed for you here in Shoot. read more


Report content or feedback to Shoot

To add ? to your lists,
login to your account or subscribe.

Find out more about plant lists here

or Login


To check if this plant is suitable for your garden first login to your account or subscribe.

or Login

In progress indicator
Note

Note

You are adding a note to: ?

Cancel