Early crocus
Crocus tommasinianus · Iridaceae
📷 Ulf Eliasson · CC BY 2.5
The gardener's calendar
Ideal time to plant early crocus: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Family
- Iridaceae
- Plant type
- Flowering bulb
- Blooming
- February to March
- Adult height
- About 10 cm
- Sunlight
- Full sun
- Foliage
- Deciduous, disappears after flowering
- Hardiness
- Very hardy, down to -15°C
- Origin
- South-east Europe (Balkans)
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability high.
Expert tips
The key tip
Crocus tommasinianus should be planted deep (8–10 cm) from September onwards so it establishes before winter. It flowers very early (February), even through snow.
The common mistake
Planting in November–December is too late: the corms don't root before frost arrives and rot.
The pro's trick
Group them 15–20 in the same hole, spaced 5 cm apart.
Care
Sunlight
Tommasini's crocus appreciates a sunny location for optimal blooming. It can tolerate light partial shade, but will flower less abundantly. Plant it in an open area where it benefits from at least 6 hours of direct sunlight daily, ideally in a front border or at the edge of a flowerbed.
Soil and planting
This crocus prefers well-drained, gravelly or sandy soil that prevents water stagnation. Plant the bulbs in autumn (September-November), 5-8 cm deep and spaced 5-8 cm apart. Poor or light soil suits it perfectly; improve with coarse sand if your soil is too compact.
Watering
After planting, water moderately to ensure good soil-bulb contact. During growth and flowering, occasional watering is sufficient; crocus prefers to stay dry rather than too wet. No watering is necessary once the flowers fade and the foliage disappears.
Fertilizer
A potassium-rich fertilizer applied at planting time promotes flowering. The following year, a light application of balanced fertilizer at the beginning of spring stimulates multiplication of bulblets. Avoid excess nitrogen, which favors foliage at the expense of flowers.
Post-flowering care
Don't cut the foliage immediately after flowering: let it fade naturally so that energy returns to the bulb. You can remove it completely once it's yellowed and dry, usually in May. Divide and replant small bulblets in autumn to rejuvenate colonies.
Pests and diseases
Tommasini's crocus is very robust and rarely affected by disease. Bulb rot occurs mainly in wet or poorly drained soil. Watch out for rodents (voles) that can devour bulbs: protect them at planting time or use fine mesh netting if needed.
Did you know?
Tommasini's crocus is one of the first flowers to appear in the heart of winter, often as early as February, well before common crocus varieties. It owes its name to Italian botanist Muzio Giuseppe Tommasini. It's a pioneering species for naturalizing in gardens, capable of multiplying spontaneously and forming magical flower carpets that return year after year without any intervention.
Where to buy it
Plant the bulbs in autumn for spring flowering. Pick a plant with healthy foliage and roots that are not exposed. Best time: from September to November.
Add this plant to my garden →Plants from the same family
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- Golden-eyed GrassSisyrinchium californicum
Tips generated and checked by Viridia — adapt them to your local climate.