Bluestar
Amsonia tabernaemontana Walter
- light
- Sun–part
- water
- Medium
- tall
- 76 cm
- wide
- 53 cm
Apocynaceae
Also called Eastern bluestar
When it flowers
JFMAMJJASOND
Not known yet in the tropics: too few flowering observations to read a season from.
PetsRHS lists it as toxic to dogs and cats (25 Oct 2026)
PeopleNo safety information yet
If a child, a pet or anyone may have eaten a plant, contact a doctor or vet straight away, or call the National Poisons Information Centre (AIIMS, New Delhi) on 1800 116 117, free and open 24 hours.
Something wrong with it?About it
- Grows as
- PerennialKew's checklist, not yet checked
- Climate
- TemperateKew's checklist, not yet checked
- Wild in
- C. & E. U.S.A.Kew's checklist, not yet checked
- Light
- Full sun to part shade (3 h or more)Read from NC State Extension and RHS, checked by a majority of its sourcesBacked by both sources
- Height
- 61 cm to 91 cmRead from NC State Extension and RHS, checked by a majority of its sourcesBacked by both sources. Sources differ: NC State Extension 2–3 ft; RHS 0.5–1 m
- Spread
- 36 cm to 71 cmRead from NC State Extension and RHS, checked: the middle of what its sources sayHalfway between its 2 sources, which differ. Sources differ: NC State Extension 2–3 ft; RHS 0.1–0.5 m
- Water
- Average: moist, well drainedRead from NC State Extension and RHS, checked by a majority of its sourcesBacked by both sources
- Flowers
- BlueRead from NC State Extension and RHS, checked by a majority of its sourcesBacked by both sources
- Coldest it survives
- -27.5 °C (USDA zone 5a)Read from NC State Extension and RHS, checked: the middle of what its sources sayHalfway between its 2 sources, which differ. Sources differ: NC State Extension -40 °C; RHS -15 °C
Not known yet: heat, hottest it survives.
In other languages (1)
- Chinese
- 柳叶水甘草
Where this comes from
- Wikidata, read 2026-10-25, CC0-1.0
- Kew's checklist, read 2026-10-24, CC-BY-4.0
- NC State Extension, read 2026-10-25, fact, cited
- RHS, read 2026-10-25, fact, cited
- Wikimedia Commons, read 2026-10-25, CC BY-SA 3.0
- 3D model: Amsonia tabernaemontana (built for Vanagrha) by Vanagrha, own
A fact “checked by a majority of its sources” was settled by a vote of the pages it was read from, not by a person reading it; one marked “one source” rests on that page alone. Anything else not marked checked has not been checked yet. Where nothing is known, the page says so rather than guess.