Dutch crocus Crocus vernus
Dutch crocus (Crocus vernus) is a deciduous perennial flowering plant in the Iridaceae family, native to Mountain meadows from the Pyrenees and Alps to the Balkans. It grows 8–15 cm (3–6 in) tall and 5–10 cm (2–4 in) wide, wants part sun to part shade and low water, and is hardy to about -34 °C (-29 °F). Space plants about 8 cm (3 in) apart.
Plan Dutch crocus in your garden →
Free. Draw your beds, then watch it grow through the year in 2D and 3D.
Dutch crocus at a glance
| Type | Perennial flowering plant, deciduous |
|---|---|
| Family | Iridaceae |
| Mature height | 8–15 cm (3–6 in) |
| Mature spread | 5–10 cm (2–4 in) |
| Spacing | 8 cm (3 in) centre to centre |
| Sun | Part sun to part shade, at least 4 h of direct sun a day |
| Water | Low; drought tolerance moderate, waterlogging tolerance none |
| Soil pH | 6–7.5 |
| Cold hardiness | About -34 °C (-29 °F) once established (roughly USDA zone 4) |
| Heat stress | Likely above about 25 °C (77 °F) |
| Flowering | from about March for 2–4 weeks (northern hemisphere; later in cold climates, earlier in warm ones) |
| Wind tolerance | Low |
| Pollinator value | High |
| Edible | Not grown as food |
| Native to | Mountain meadows from the Pyrenees and Alps to the Balkans |
| Common in gardens of | 🇬🇧 United Kingdom, 🇩🇪 Germany, 🇳🇴 Norway, 🇺🇸 United States, 🇳🇱 Netherlands |
Is Dutch crocus toxic?
- People: mildly toxic
- Cats: mildly toxic
- Dogs: mildly toxic
- Parts: corms
Spring crocus can cause mild stomach upset; it is not the highly toxic autumn crocus (Colchicum).
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 Dutch crocus
No well-documented helpful pairing. Group it with plants that like part sun to part shade and low water.
Questions about Dutch crocus
- How far apart should I plant Dutch crocus?
- About 8 cm (3 in) apart, centre to centre. A mature plant spreads 5–10 cm (2–4 in).
- Does Dutch crocus need full sun?
- Part sun to part shade: at least 4 hours of direct sun a day.
- How much water does Dutch crocus need?
- Low water. Drought tolerance is moderate and waterlogging tolerance none.
- How cold-hardy is Dutch crocus?
- It tolerates about -34 °C (-29 °F) once established, roughly USDA zone 4.
- When does Dutch crocus flower?
- From about March for 2–4 weeks (northern hemisphere; later in cold climates, earlier in warm ones).
- Is Dutch crocus poisonous to cats and dogs?
- For cats it is mildly toxic; for dogs mildly toxic; for people mildly toxic. Spring crocus can cause mild stomach upset; it is not the highly toxic autumn crocus (Colchicum).
- What grows well with Dutch crocus?
- There is no well-documented companion pairing for Dutch crocus. Group it with plants that like the same sun (part sun to part shade) and water (low).
Sources and evidence
Evidence grade B (B: extension service or peer-reviewed).
- RHS Plant Finder, Royal Horticultural Society
- Missouri Botanical Garden Plant Finder, Missouri Botanical Garden
- ASPCA Toxic and Non-Toxic Plant List, ASPCA
Notes and assumptions
- Typical garden-form values; cultivars and local conditions differ.
- Planted as dormant corms in autumn; foliage dies back by late spring.
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
- Bearded iris Iris germanica
- Japanese iris Iris ensata
- Siberian iris Iris sibirica
- Gladiolus Gladiolus x hortulanus
- Freesia Freesia refracta hybrids
- Montbretia (crocosmia) Crocosmia x crocosmiiflora
- African iris Dietes grandiflora
- Bugle lily (watsonia) Watsonia borbonica