Autumn Crocus (Colchicum)

Overview

Colchicums are September's naked ladies - goblet blooms of pink-lilac erupting leafless from bare soil, bigger and blowsier than any true crocus, with spring foliage arriving months later like a delayed apology. Beautiful, permanent - and seriously toxic, which their deer-proof carefree life reflects. (Colchicum autumnale.)

Origin & Natural Habitat

European meadows; the source of colchicine (gout medicine and plant-breeding tool) - chemistry with consequences.

Appearance

15-25 cm chalices - lilac-pink, checkered ('Waterlily' double) - in Sep-Oct from bare earth; broad glossy leaves follow in SPRING then die by summer.

Why People Grow It - Qualities & Benefits

• Surprise goblets in tired September beds
• Huge (for 'crocus') blousy blooms
• Immortal, deer/rodent/everything-proof
• Blooms even sitting dry on a windowsill (party trick)

Care

Light: Sun to half-shade; under shrubs, in rough grass.

Water: Rain-fed; utterly independent.

Soil: Any decent drained soil.

Planting: Late summer (they bloom WEEKS after planting - instant gratification), 10 cm deep.

Hardiness: Zones 4-8.

After flowering: Tolerate the big spring foliage (it feeds the show) and mow/tidy only when it yellows in June.

Propagation

Divide congested clumps in summer dormancy; they build steadily solo.

Common Problems & Pests

• Spring leaf-mass surprises the unwarned (site accordingly)
• Slugs on petals
• Confusion with saffron (see FAQ - important)

Toxicity & Safety

SERIOUSLY toxic (colchicine) - all parts, to people and pets; never confuse with edible saffron crocus, never plant near forage areas; handle bulbs with gloves if skin-sensitive. Its pest-proof life is this chemistry.

Pros & Cons

Pros

• Effortless autumn spectacle
• Truly permanent
• Nothing eats it, ever

Cons

• Real toxicity to respect
• Big sloppy spring leaves
• Floppy blooms in heavy rain

Best Suited For

• Under roses and shrubs (leaf camo)
• Rough grass corners
• September-tired borders
• Low-maintenance forever-gardens

FAQ

Is this where saffron comes from?

NO - saffron is true autumn-flowering Crocus sativus; colchicum is unrelated and poisonous. Never harvest 'saffron' from a garden unless you planted labeled C. sativus yourself.

It bloomed on my shelf before planting?!

Colchicums carry a charge - dry corms bloom unplanted as a famous parlor trick. Plant after; the roots follow in soil.