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Science & Nature • Botany

Crocus

Crocus is a genus of flowering plants in the iris family (Iridaceae), made up of low-growing perennial geophytes that grow from corms.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

Crocus is a genus of flowering plants in the iris family (Iridaceae), made up of low-growing perennial geophytes that grow from corms. The genus includes species that bloom in late winter, spring, or autumn, and several are widely cultivated as ornamentals. Crocuses are widely grown in Canadian gardens as early spring ornamentals and are familiar seasonal flowers in temperate parts of the country.

Description

Crocus is a genus of dwarf, herbaceous perennial plants in the iris family. The plants typically have narrow, grass-like leaves and solitary, cup-shaped flowers that arise from corms.

Distribution and habitat

Species of Crocus are native to woodland, scrub, meadows, and alpine or subalpine habitats across southern and central Europe, North Africa, the Middle East, Central Asia, and western China.

Cultivation and uses

Crocuses are popular ornamental plants in temperate gardens, especially for early spring display. The best-known economic use of the genus is saffron, which is harvested from the stigmas of *Crocus sativus*.

Reproduction and growth

Crocus plants can be propagated from seed or from daughter cormels that form on the parent corm. They are perennials that die back after flowering and remain dormant underground during unfavorable seasons.

Key facts

  • Crocus species grow from underground corms rather than true bulbs.
  • They are native across a broad Eurasian and North African range, from Mediterranean regions to western China.
  • Many crocuses are cultivated for their cup-shaped flowers and early seasonal bloom.
  • The genus includes both spring-flowering and autumn-flowering species.
  • *Crocus sativus* is the species used to produce saffron.
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Canadian context

Crocuses are widely grown in Canadian gardens as early spring ornamentals and are familiar seasonal flowers in temperate parts of the country.

Frequently asked questions

What is a crocus?
A crocus is a flowering plant in the genus *Crocus* of the iris family, known for low-growing, cup-shaped flowers and growth from corms.
Are crocuses bulbs or corms?
Crocuses are technically corms, not true bulbs.
When do crocuses bloom?
Depending on the species, crocuses bloom in late winter, early spring, or autumn.
What is saffron crocus?
Saffron crocus is *Crocus sativus*, the species whose stigmas are dried to make saffron.
Where do crocuses grow naturally?
They are native to regions from the Mediterranean and southern Europe through North Africa and the Middle East to Central Asia and western China.

References

  1. Britannica — https://www.britannica.com/plant/Crocus
    Supports: Genus size, family, native range, and general description.
  2. Wikipedia — https://en.wikipedia.org/wiki/Crocus
    Supports: Growth form, cormous habit, propagation, and broad native distribution.
  3. Oxford University — https://herbaria.plants.ox.ac.uk/bol/plants400/Profiles/cd/crocus
    Supports: Approximate number of species, distribution, habitats, and saffron use.
  4. University of California Agriculture and Natural Resources — https://ucanr.edu/sites/default/files/2011-03/80135.pdf
    Supports: Family placement, perennial corm growth, and broad geographic spread.