Winter aconite
Eranthis hyemalis. Family Ranunculaceae. Bulb.
Also called Winter hellebore.
Winter aconite is a small, tuberous perennial with yellow, buttercup-like flowers held above collars of divided green bracts in late winter. It can form carpets beneath deciduous trees, flowering before their leaves open, then disappearing underground by early summer. It needs winter cold and is poorly suited to frost-free climates.
At a glance
- Sun
- Full sun to partial shade while growing; ideal beneath deciduous trees that provide summer shade.
- Water
- Keep evenly moist during autumn, winter and spring, without waterlogging. Once dormant, it needs little watering unless the soil becomes extremely dry.
- Soil
- Humus-rich, well-drained soil that retains spring moisture; neutral to alkaline soil is ideal.
- Height
- 0.25-0.5 ft (0.08-0.15 m)
- Spread
- 0.25-0.5 ft (0.08-0.15 m) per plant; colonies spread farther by seed
- Flowers
- Late winter to early spring; bright yellow flowers that open most fully in sunshine.
- Foliage
- Deeply divided green basal leaves emerge around flowering time and die back by early summer; each flower has a separate collar of leaf-like green bracts.
- Growth
- Moderate once established; seedlings take several years to flower.
- Care needed
- Low
Care
- Plant fresh tubers promptly in autumn, about 2 in (5 cm) deep and 3 in (8 cm) apart; avoid shrivelled stock.
- Water during dry spells while leaves are green, but keep the planting site free of standing water.
- Apply a thin layer of leaf mould or well-rotted compost in autumn; routine feeding is rarely needed.
- Leave the foliage until it yellows naturally, and delay mowing naturalised areas until then.
- Move or divide crowded clumps just after flowering, keeping roots moist and replanting immediately.
Pruning. No pruning is needed. Remove dead foliage only after it has yellowed completely; leave seedheads if you want the colony to spread.
Through the year
- Late winter
- Watch for emerging flowers and check for slug damage during mild, wet weather.
- Early spring
- Divide or transplant clumps just after flowering, while leaves are still green.
- Late spring
- Collect seed as capsules ripen and sow immediately, or let it fall naturally.
- Early summer
- Allow leaves to die back fully before clearing foliage or mowing.
- Autumn
- Plant fresh tubers and top-dress established colonies with leaf mould.
In the garden
- Plant in drifts beneath deciduous trees for yellow carpets before the canopy closes.
- Combine with snowdrops and early crocuses beside paths where the small flowers are easy to see.
- Use at the front of woodland borders, with hostas or ferns that expand after the aconites become dormant.
- Naturalise in lightly shaded grass where mowing can wait until the leaves have died back.
Garden styles it suits: Woodland, Cottage garden, English country, Winter interest, Pollinator garden and Low-maintenance.
Plant it with: Snowdrops, Early crocuses, Hellebores, Lungwort, Hostas and Deciduous ferns.
Wildlife: Flowers provide early pollen and nectar for bees when weather is warm enough for them to forage. Deer and rabbits usually leave the plants alone.
Problems to watch for
- Shrivelled tubers fail to establish: buy fresh stock and plant promptly, or buy growing plants just after flowering.
- Tubers rot in waterlogged soil: improve drainage or move plants to a better-drained site.
- Slugs and snails damage emerging growth: check plants during damp weather and use traps or an approved iron-phosphate bait if needed.
- A colony dwindles after early mowing or tidying: leave all green foliage intact until it yellows naturally.
Safety
All parts, especially the tubers, are poisonous if eaten by people, cats, dogs or horses. Ingestion can cause vomiting, diarrhoea and potentially serious heart disturbances. Keep tubers away from children and animals, and seek urgent medical or veterinary advice after suspected ingestion.
Easily confused with
Cilician winter aconite (Eranthis cilicica)
Usually flowers a little later and has more finely divided foliage, often bronze-tinted as it emerges; the two species can be difficult to separate in gardens.
Lesser celandine (Ficaria verna)
Has glossy, heart- or kidney-shaped leaves and starrier yellow flowers, without the finely divided green collar directly beneath each flower. It is invasive in parts of North America.
The name
Eranthis comes from Greek words meaning spring flower, while hyemalis means wintry; the common name refers to its early flowering and foliage resembling that of aconites.
Propagation. Divide established clumps just after flowering and replant immediately. Alternatively, sow freshly collected seed outdoors in pots or a nursery bed; germination may be delayed, and seedlings commonly take three or more years to flower. It can self-seed freely where conditions suit it.
Checked against open data
- Accepted botanical name
- Eranthis hyemalis
- In the US and Canada
- Introduced in Canada and the lower 48 states.
- Native range
- Bulgaria, France, Italy, Lebanon-Syria and Yugoslavia.
- Measured
- Soil pH 6.5 to 7. Average height 12 cm.
Sources: GBIF (CC BY 4.0), USDA PLANTS and Trefle (CC BY 4.0). The care and design notes are LandscapeGPT's own.
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