perennial

Wooly Buttercup

The Story

Plant Bio

Ranunculus lanuginosus, the wooly buttercup, is a clump-forming herbaceous perennial native to the moist, shaded beech forests of central and eastern Europe. The species is distinguished by its thick, hollow stems and mid-green basal leaves, both of which are covered in a dense layer of fine, soft hairs.

In late spring, bowl-shaped yellow flowers up to three centimeters across rise on elongated stems well above the deeply lobed, double-serrated foliage. The plant spreads slowly to form a lush mound, relying on its acrid, protoanemonin-rich sap to deter browsing deer and rabbits.

Uses & Benefits:

Provides a lush, textured ground cover of deeply lobed, hairy foliage topped by bright yellow buttercup flowers in late spring.

Highly resistant to browsing by deer and rabbits due to toxic chemical compounds in its sap.

The open, shallow flowers offer accessible pollen and nectar to native bees, flies, and other generalist insect pollinators.

Essentials

At a Glance

Plant Type

Perennial

Height

31"

Width

20"

Light

Full Sun, Partial Sun, Shade

Zones

5, 6, 7, 8, 9

Water

Consistent moisture

Humidity

Moderate to high

Lifespan

Perennial

Native To

Central and Eastern Europe

Toxicity

Toxic to humans and animals; causes skin irritation

Bloom period

Late spring – Early summer

In flower about 2 months of the year

Planting

How to Grow

Select a planting site with moist, fertile, well-draining soil in partial to dappled shade.
Incorporate compost or leaf mold into the planting hole to mimic a natural woodland floor.
Set the plant at the same depth as its nursery container, firming the soil gently around the crown.
Water thoroughly and maintain consistent moisture, especially during dry summer spells.

Pro Tip

Never prune aggressively into the dead, leafless woody crown tissue where new buds cannot emerge, and always wear gloves when dividing to avoid contact dermatitis from the acrid sap.

Keep It Thriving

Care Guide

Do

Wear protective gloves whenever handling or dividing the plant to avoid skin irritation from the sap.
Mulch annually with leaf mold to retain soil moisture and cool root temperatures.
Cut back spent flower stems to the basal foliage mound after blooming finishes.

Don't

Do not plant in heavy, unamended clay soils that retain standing water.
Do not prune aggressively into the woody crown tissue where new buds form.
Do not over-fertilize, which causes weak, floppy stems and increases disease susceptibility.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deadhead
Divide
Pest Check
Spring Cleanup
Winter Prep

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Woodland GardensShaded BordersNaturalized AreasUnderstory Planting

Companion Plants

Anemone nemorosa Tiarella cordifolia Hosta

Multiply

Propagation Methods

Good to Know

Common Questions

Wooly Buttercup questions

What zones can Wooly Buttercup grow in?

Wooly Buttercup is hardy in USDA Zones 5–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Wooly Buttercup deer resistant?

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

When does Wooly Buttercup bloom?

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

Does Wooly Buttercup need full sun?

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