How to Grow Saffron Crocuses

By the SoilCommander Editorial Team, under the guidance of Nitin Sharma, Co-Founder · · How we check our facts

On this page
  1. Saffron Crocus (Crocus sativus)
  2. Growth Stages
  3. Quick Facts
  4. At a Glance
  5. Harvest & Storage
  6. Diseases
  7. Pests
  8. Plan your Saffron Crocuses planting
  9. Growing Saffron Crocus in another region
  10. Sources
  11. Frequently Asked Questions

Saffron crocuses (Crocus sativus) — Autumn-flowering perennial corm.

Unlike an annual crop, the work here is front-loaded into establishment: get the planting and the site right and the same plants crop for several seasons.

Core growing advice on this page is checked against named horticultural sources — see References.

Saffron Crocus (Crocus sativus)

Saffron crocus (Crocus sativus) flower showing the long red stigmas — “Крокусы под снегом” by Ulaisaeva is licensed under CC BY-SA 4.0.

2 sources cited · Verified

Growth Stages

Grass-like saffron crocus foliage after flowering — “Crocus sativus, saffron (16)” by Emilie40 is licensed under CC0.
“Crocus sativus, saffron (16)” by Emilie40 is licensed under CC0.
Stage BBCH Notes
Corm planting 0 RHS: plant corms in late summer (September acceptable), 10-15cm deep, ~10cm apart, in rich but well-drained soil in a bright, sunny site; water in well. NC State: plant ~4in apart and 4in deep in well-drained soil with moderate organic matter.
Autumn flowering 6 RHS: flowers typically appear in October, often a little later in the first year -- unusual among crocuses for flowering in autumn rather than spring. NC State: purple to lavender flowers appear for a 1-2 week fall bloom period, each corm producing 2-4 flowers; the harvest window is this same short period.
Winter foliage 3 RHS: plants reach around 30cm tall over winter as grass-like leaves develop after flowering. Both sources note the flowers themselves are sterile and set no seed -- all increase is via cormlets forming underground.
Dieback and dormancy 9 RHS: foliage dies back completely in late spring, leaving the corm dormant in the soil through summer until autumn growth resumes. RHS notes a corm may take two to three years to reach flowering size after being replaced by cormlets.

Quick Facts

Close-up of a saffron crocus flower from above — “Crocus sativus, saffron (35)” by Emilie40 is licensed under CC0.
“Crocus sativus, saffron (35)” by Emilie40 is licensed under CC0.
Factor Value
Drainage Rich but well-drained (RHS); NC State: loam with high organic matter and sand, good drainage, tolerates occasionally dry.
Lifecycle Autumn-flowering perennial corm. The flowers are sterile and set no seed -- the plant increases purely by cormlets.
Edible parts flowers

At a Glance

Side view of a saffron crocus flower and its drooping red stigmas — “Crocus sativus, saffron (39)” by Emilie40 is licensed under CC0.
“Crocus sativus, saffron (39)” by Emilie40 is licensed under CC0.
Crocus sativus Saffron Crocus Corm rot (saffron crocu… Saffron crocus fungal d… Squirrels Birds and rodents (saff… Mice DISEASES PESTS

Harvest & Storage

Dried saffron threads, harvested from Crocus sativus stigmas — “Safran-Weinviertel Niederreiter 2 Gramm 8285” by Hubertl is licensed under CC BY-SA 4.0.
“Safran-Weinviertel Niederreiter 2 Gramm 8285” by Hubertl is licensed under CC BY-SA 4.0.

When to pick: RHS/NC State: use tweezers to pick the long red stigmas from the centre of each flower, avoiding the shorter, paler orange stamens; harvest through the 1-2 week autumn bloom. Roughly 150 flowers yield 1g of dried saffron.

Storage

Dry threads on a kitchen towel on a baking rack at room temperature for at least 24 hours, then store in an airtight container away from light (RHS).

Diseases

A lilac saffron crocus flower with orange anthers and red stigmas — “Crocus sativus, saffron (27)” by Emilie40 is licensed under CC0.
“Crocus sativus, saffron (27)” by Emilie40 is licensed under CC0.
Corm rot (saffron crocus, causal agent not yet confirmed)
low

RHS: corms may rot in storage. NC State independently names root rot in poorly drained planting sites -- a genuine corroboration that drainage is the key risk factor, both in the ground and in storage.

Saffron crocus fungal diseases (unspecified/unidentified)
low

Named only vaguely by NC State ("fungal disease risk during wet blooming periods"), no species identified -- generic entry created rather than guessing a pathogen. RHS describes the plant as generally disease-free.

Pests

A cluster of saffron crocus flowers with visible red stigmas — “Crocus sativus, saffron (30)” by Emilie40 is licensed under CC0.
“Crocus sativus, saffron (30)” by Emilie40 is licensed under CC0.
Squirrels
moderate

Sciurus spp.

Named specifically by NC State as a corm-eating rodent; RHS names rodents generically.

Birds and rodents (saffron corms)
moderate

various

Generic entry for RHS's "rodents and birds" corm-predation note, corroborated independently by NC State naming squirrels and mice as corm predators.

Mice
moderate

Muridae (mice, various spp.)

Named specifically by NC State as a corm-eating rodent; RHS names rodents generically.

Plan your Saffron Crocuses planting

Timing for Saffron Crocuses follows soil temperature and frost, not the calendar date. The Global vegetable planting calendar explains the method. To work out where it fits in your beds, sketch your plot in the free Garden Layout Planner.

Growing Saffron Crocus in another region

Sowing dates, frost timing and local advice differ by country. Use the guide for where you garden.

Sources

The full list of 2 sources behind this guide (North Carolina State University Extension (Plant Toolbox), Royal Horticultural Society) is in the references of our UK guide to saffron crocuses; they describe the plant itself, which is the same wherever it grows.

Frequently Asked Questions

What problems affect saffron crocuses?

Our data links 2 diseases and 3 pests to this crop. See the sections above for each one and how to manage it.

Plan next season before the problems start

This page gives you the thresholds; the planner turns them into your own calendar. It works from what you can observe and measure in your garden rather than from dates written for somebody else’s latitude.

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SoilCommander Editorial Team — under the guidance of Nitin Sharma, Co-Founder

Every growing guide is checked against RHS, USDA Cooperative Extension, and other named horticultural authorities before publishing. How we check our facts.

How this guide is put together

The growing data on this page — sowing windows, pests, diseases, soil and site requirements — comes from named horticultural sources, listed in References below, checked against international horticultural research and extension sources. An automated pipeline assembles that verified data into the page you're reading: it selects which facts to lead with and builds the surrounding prose and layout. It does not invent a date, a source or a number — where a verified value for a field isn't available, the page leaves it out rather than guessing. A person reviews and publishes each page; nothing goes live unverified.

Vegetable Growing Guides

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Last verified 2026-09-04

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