Colchicum byzantinum

One of the most rewarding autumn-flowering bulbs, Colchicum byzantinum produces generous clusters of delicate lilac-pink flowers that emerge directly from the ground in early autumn, bringing vibrant colour to the garden when most summer flowers are fading.

Unlike true crocuses, Colchicums belong to the lily family and are affectionately known as Autumn Crocuses or Naked Ladies because the flowers appear before any foliage is visible. Colchicum byzantinum is particularly valued for its free-flowering nature, with each large bulb capable of producing numerous blooms, creating an impressive display from a single planting.

Native to the eastern Mediterranean, this hardy perennial has been cultivated in gardens for centuries and is prized for its ability to naturalise. In spring, broad, glossy green leaves emerge to replenish the bulb before dying back in early summer, leaving the ground clear until the spectacular autumn flowers appear.

Ideal for naturalising beneath deciduous trees, in lawns, gravel gardens, woodland settings or mixed perennial borders, Colchicum byzantinum gradually forms beautiful clumps that become more impressive with each passing year. Its nectar-rich blooms also provide a welcome late-season food source for bees and other pollinating insects.

Please note: All parts of Colchicum are poisonous if eaten. Wear gloves when handling bulbs and keep away from children and pets.

Planting Instructions

When to Plant:

Plant Colchicum bulbs as soon as they arrive in late August or September. They establish quickly and often flower just a few weeks after planting.

Where to Plant:
Choose a position in full sun or partial shade with fertile, well-drained soil. Colchicum byzantinum is perfect for borders, woodland gardens, beneath deciduous trees, gravel gardens and naturalising in grass.

How to Plant:

• Depth: Plant bulbs approximately 10–15 cm (4–6 inches) deep.
• Spacing: Space bulbs around 15–20 cm (6–8 inches) apart.
• Soil Prep: Improve poor soils with compost before planting and ensure good drainage to prevent winter waterlogging.

Watering:
Water thoroughly after planting if the soil is dry. Once established, rainfall is usually sufficient except during prolonged dry spells.

Aftercare Tips:

• Enjoy the flowers in autumn before the foliage appears.
• Allow the broad spring leaves to die back naturally in early summer to feed the bulb for the following year's flowers.
• Leave bulbs undisturbed where possible, as they will gradually form larger flowering clumps.

Top Tip:
Plant in generous groups where the clusters of lilac-pink flowers can create a natural carpet of colour each autumn. They look particularly beautiful amongst ornamental grasses and low-growing ground cover.

Plant Details

Flowering Period:
September – October (depending on season and conditions)

Height:
6–8" (15–20cm) (flowers)
Spring foliage: 10–12" (25–30cm)

Position:
Full sun or partial shade

Hardy Perennial