annualN. America Native

Cursed Buttercup

The Story

Plant Bio

Ranunculus sceleratus, the cursed buttercup, is an erect, hollow-stemmed annual herb reaching eight to twenty-four inches in height, native to wet habitats across Eurasia and North America. The shiny green foliage is deeply lobed into three distinct segments resembling celery leaves, arising from a heavily branched, hairless main stem.

This species is distinguished by its exceptionally small, pale yellow flowers that feature an elongated central receptacle, which swells into a prominent cylindrical seed head as the achenes mature. The entire plant contains high concentrations of ranunculin, a toxic compound that causes severe skin blistering upon contact with the crushed foliage.

Uses & Benefits:

Provides a modest, wild appearance in boggy areas with its shiny, celery-like foliage and small yellow flowers.

Useful for stabilizing muddy banks and wet ditches where other terrestrial plants fail to survive.

Supports generalist native pollinators, small flies, and beneficial insects in saturated wetland ecosystems.

Essentials

At a Glance

Plant Type

Annual

Height

24"

Width

12"

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8, 9

Water

High

Humidity

High

Lifespan

Annual

Native To

Eurasia, North America

Toxicity

Highly toxic; causes skin blistering and severe poisoning if ingested

Bloom period

Spring – Summer

In flower about 6 months of the year

Planting

How to Grow

Sow seeds in late fall or early spring directly onto the surface of saturated, muddy soil.
Maintain consistently wet conditions, as the seeds require constant moisture and light to germinate.
Thin emerging seedlings to space them six to twelve inches apart in full sun to partial shade.
Monitor the site during summer and hand-pull plants before the seed heads turn brown to control spread.

Pro Tip

Wear heavy gloves when handling this plant to avoid contact with the acrid sap, and manually pull the shallow roots before the cylindrical seed heads mature to prevent aggressive self-seeding in wet soils.

Keep It Thriving

Care Guide

Do

Wear protective gloves and long sleeves whenever handling or weeding this plant.
Keep the soil saturated or submerged in shallow standing water to mimic its natural wetland habitat.
Allow the plant to complete its annual lifecycle naturally if establishing a wild wetland meadow.

Don't

Do not plant this species near pastures, livestock areas, or residential gardens where children and pets play.
Do not compost pulled plants with mature seed heads, as the seeds survive composting and will spread.
Do not allow the soil to dry out, which causes rapid decline and premature death of the plant.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Pest Check
Plant
Prune
Winter Prep

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Rain GardenBog GardenWetland Restoration

Companion Plants

Caltha palustris Mimulus ringens Iris versicolor

Multiply

Propagation Methods

Good to Know

Common Questions

Cursed Buttercup questions

What zones can Cursed Buttercup grow in?

Cursed Buttercup is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Cursed Buttercup deer resistant?

Yes — Cursed Buttercup is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Cursed Buttercup bloom?

Cursed Buttercup typically blooms in spring through summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Cursed Buttercup need full sun?

Cursed Buttercup does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.