Amsonia orientalis

Amsonia orientalis

Blue star

A table displaying which months are best to sow, plant and harvest.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Flowers
Flowers

Plant does not flower in January

Plant does not flower in February

Plant does not flower in March

Plant does not flower in April

Plant does not flower in May

Plant does flower in June

Plant does flower in July

Plant does flower in August

Plant does not flower in September

Plant does not flower in October

Plant does not flower in November

Plant does not flower in December

  • Botanical name: Amsonia orientalis
  • Common name: Blue star
  • Family: Apocynaceae
  • Plant Type: Perennial

Known commonly as blue star, Amsonias bear starry flowers from late June. Slow-growing perennials, they lack drama but make the perfect foil for a number of more dramatic and colourful plants. The different species are hard to tell apart, but Amsonia orientalis has larger, brighter blue flowers than other types and longer, larger leaves. 

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Grow Amsonia orientalis in moist soil, in full sun or semi-shade. Eventually it forms tight clumps that don’t need regular division or staking. 

How to grow Amsonia orientalis

  • Plant size

    50cm height

    50cm spread

  • Aspect

    South facing, west facing

  • Position in border

    Front

  • Sun exposure: Full sun, dappled shade, partial shade
  • Hardiness: Hardy
  • Soil type: Clay / heavy / moist

Plant calendar

A table displaying which months are best to sow, plant and harvest.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Sow
Sow

Do not Sow in January

Do not Sow in February

Do Sow in March

Do Sow in April

Do Sow in May

Do not Sow in June

Do not Sow in July

Do not Sow in August

Do not Sow in September

Do not Sow in October

Do not Sow in November

Do not Sow in December

Plant
Plant

Do not Plant in January

Do not Plant in February

Do not Plant in March

Do not Plant in April

Do Plant in May

Do Plant in June

Do not Plant in July

Do not Plant in August

Do not Plant in September

Do not Plant in October

Do not Plant in November

Do not Plant in December

Flowers
Flowers

Plant does not flower in January

Plant does not flower in February

Plant does not flower in March

Plant does not flower in April

Plant does not flower in May

Plant does flower in June

Plant does flower in July

Plant does flower in August

Plant does not flower in September

Plant does not flower in October

Plant does not flower in November

Plant does not flower in December

Divide
Divide

Do not Divide in January

Do not Divide in February

Do not Divide in March

Do not Divide in April

Do not Divide in May

Do not Divide in June

Do not Divide in July

Do not Divide in August

Do Divide in September

Do Divide in October

Do not Divide in November

Do not Divide in December

Collect seeds
Collect seeds

Do not Collect seeds in January

Do not Collect seeds in February

Do not Collect seeds in March

Do not Collect seeds in April

Do not Collect seeds in May

Do not Collect seeds in June

Do not Collect seeds in July

Do Collect seeds in August

Do Collect seeds in September

Do not Collect seeds in October

Do not Collect seeds in November

Do not Collect seeds in December

Amsonia orientalis and wildlife

Amsonia orientalis has no particular known value to wildlife in the UK.

Is Amsonia orientalis poisonous?

Amsonia orientalis can be toxic.

Toxic to:

Toxic to Cats

Toxic to Dogs

Toxic to People

No reported toxicity to:

No reported toxicity to Birds

No reported toxicity to Horses

No reported toxicity to Livestock

Plants that go well with Amsonia orientalis

Geranium phaeum flowers
Plants

Geranium phaeum

Dusky cranesbill