Orchid primula (Vial’s primrose) Primula vialii
Orchid primula (Vial’s primrose) (Primula vialii) is a deciduous perennial flowering plant in the Primulaceae family, native to South-west China (Yunnan, Sichuan). It grows 30–50 cm (12–20 in) tall and 20–30 cm (8–12 in) wide, wants part sun to part shade and high water, and is hardy to about -25 °C (-13 °F). Space plants about 20 cm (8 in) apart.
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Orchid primula (Vial’s primrose) at a glance
| Type | Perennial flowering plant, deciduous |
|---|---|
| Family | Primulaceae |
| Mature height | 30–50 cm (12–20 in) |
| Mature spread | 20–30 cm (8–12 in) |
| Spacing | 20 cm (8 in) centre to centre |
| Sun | Part sun to part shade, at least 4 h of direct sun a day |
| Water | High; drought tolerance none, waterlogging tolerance low |
| Soil pH | 5–7 |
| Cold hardiness | About -25 °C (-13 °F) once established (roughly USDA zone 5) |
| Heat stress | Likely above about 28 °C (82 °F) |
| Flowering | from about June for 3–4 weeks (northern hemisphere; later in cold climates, earlier in warm ones) |
| Wind tolerance | Low |
| Pollinator value | Moderate |
| Edible | Not grown as food |
| Native to | South-west China (Yunnan, Sichuan) |
| Common in gardens of | 🇬🇧 United Kingdom, 🇮🇪 Ireland, 🇺🇸 United States, 🇳🇱 Netherlands, 🇩🇪 Germany, 🇳🇿 New Zealand, 🇯🇵 Japan |
Is Orchid primula (Vial’s primrose) toxic?
- People: mildly toxic
- Cats: mildly toxic
- Dogs: mildly toxic
- Parts: leaves
Some primulas irritate the skin of sensitive people; eating them may cause mild stomach upset in pets.
If a child or pet may have eaten part of a plant, call a poison centre or vet straight away.
Companion planting: what to grow with Orchid primula (Vial’s primrose)
No well-documented helpful pairing. Group it with plants that like part sun to part shade and high water.
Questions about Orchid primula (Vial’s primrose)
- How far apart should I plant Orchid primula (Vial’s primrose)?
- About 20 cm (8 in) apart, centre to centre. A mature plant spreads 20–30 cm (8–12 in).
- Does Orchid primula (Vial’s primrose) need full sun?
- Part sun to part shade: at least 4 hours of direct sun a day.
- How much water does Orchid primula (Vial’s primrose) need?
- High water. Drought tolerance is none and waterlogging tolerance low.
- How cold-hardy is Orchid primula (Vial’s primrose)?
- It tolerates about -25 °C (-13 °F) once established, roughly USDA zone 5.
- When does Orchid primula (Vial’s primrose) flower?
- From about June for 3–4 weeks (northern hemisphere; later in cold climates, earlier in warm ones).
- Is Orchid primula (Vial’s primrose) poisonous to cats and dogs?
- For cats it is mildly toxic; for dogs mildly toxic; for people mildly toxic. Some primulas irritate the skin of sensitive people; eating them may cause mild stomach upset in pets.
- What grows well with Orchid primula (Vial’s primrose)?
- There is no well-documented companion pairing for Orchid primula (Vial’s primrose). Group it with plants that like the same sun (part sun to part shade) and water (high).
Sources and evidence
Evidence grade A (A: strong evidence).
- Plants of the World Online (taxonomy, native range), Royal Botanic Gardens, Kew
- Flora of China, Missouri Botanical Garden & Harvard University Herbaria (eFloras)
- RHS Find a Plant (plant profiles and growing guides), Royal Horticultural Society
Notes and assumptions
- A plant of the cool, misty Himalayan and west Chinese mountains: it wants moist, humus-rich soil and shelter from hot sun and drying wind, and sulks in hot, humid summers.
- Looks nothing like a primrose: dense spikes like small red-hot pokers, scarlet in bud and violet as the flowers open, in early summer. Often short-lived, and very late to appear in spring, so mark where it grows. Collected by Forrest in 1906 and named after the French missionary Paul Vial.
Reference values for planning, not horticultural, veterinary or medical advice. Varieties, soils and local climates differ: check with a local nursery or extension service.
Related plants
- Primrose Primula vulgaris
- Ivy-leaved cyclamen Cyclamen hederifolium
- Creeping Jenny Lysimachia nummularia
- Auricula Primula auricula
- Cowslip Primula veris
- Giant Himalayan cowslip Primula florindae
- Florist’s cyclamen Cyclamen persicum
- Coral ardisia (manryō) Ardisia crenata