Periwinkle

ಸದಾಪುಷ್ಪसदाबहारபட்டிப்பூ,

Catharanthus roseus (L.) G.Don

light
Full sun
water
Medium
tall
30 cm
wide
25 cm

Apocynaceae

Also called Madagascar Periwinkle, Billygoat Weed, Tropical Periwinkle, White Vinca Flower, Oldmaid

Formerly Ammocallis rosea, Lochnera rosea, Pervinca rosea, Vinca rosea

When it flowers

Flowers June to February in the tropics.

Read from iNaturalist photographs of it in flower. A month counts at 50% of the best month's flowering share (smoothed over three months) and 10% of its flowering count, from at least 100 flowering observations in the band.

PetsNC State Extension lists it as toxic to dogs, cats and horses (28 Oct 2026)
PeopleNC State Extension lists it as mildly poisonous (flowers, fruits, leaves, roots, seeds, stems) (25 Oct 2026)

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
Subshrub or shrubKew's checklist, not yet checked
Climate
Seasonally dry tropicalKew's checklist, not yet checked
Wild in
E. & S. MadagascarKew's checklist, not yet checked
Light
Full sun (6 h or more)Read from NC State Extension and RHS, checked by a majority of its sourcesBacked by both sources. Sources differ: NC State Extension full, part; RHS full
Height
15 cm to 46 cmRead from NC State Extension and RHS, checked by a majority of its sourcesBacked by both sources. Sources differ: NC State Extension 6–18 in; RHS 0.1–0.5 m
Spread
20 cm to 30 cmRead from NC State Extension and RHS, checked by a majority of its sourcesBacked by both sources. Sources differ: NC State Extension 8–12 in; 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
White, pinkRead from NC State Extension and RHS, checked by a majority of its sourcesBacked by both sources. Sources differ: NC State Extension pink, purple, white, yellow; RHS pink, red, white
Coldest it survives
2 °C (USDA zone 10b)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 -1.1 °C; RHS 5 °C

Not known yet: heat, hottest it survives.

Grow it with

Suggested by a rule, not by a gardener: same climate (kew), flowering when this plant does not (inaturalist), and a different shape.

In other languages (12)

Spanish
Jabonera de Madagascar, chula, Espanta novia
Indonesian
Tapak Dara
Chinese
長春花, 日日春
Hawaiian
Kihapai
Portuguese
Vinca-de-Madagascar, Boa-noite
Japanese
ニチニチソウ
Hebrew
וינקה ורודה
Chinese (China)
长春花
Finnish
ruusukatara
Czech
barvínkovec růžový
French
Pervenche de Madagascar
Ukrainian
Катарантус рожевий

Where this comes from

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.