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Thalictrum minus

lesser meadow-rue

Ranunculaceae

Europe, North Africa, temperate Asia

Deer Resistant

SunFull Sun – Part Shade

WaterMedium

HardinessZones 5–8

Overview

Thalictrum minus is a clump-forming herbaceous perennial 12-60 inches (30-150 cm) tall, variable across its wide range, with wiry stems rising from short rhizomes. The leaves are two to four times divided into many small, rounded to wedge-shaped leaflets 0.2-0.6 inch (5-15 mm) long, blue-green above and paler beneath, resembling those of a maidenhair fern. From June to August it bears airy, branched heads of tiny pendulous flowers that lack petals; each flower is reduced to four small greenish-yellow sepals and a tassel of dangling yellow stamens. The flowers are wind-pollinated, the drooping stamens releasing pollen to the breeze. It grows in grassland, rocky slopes, dunes, and open woodland on calcareous or neutral soils across Europe, North Africa, and much of Asia. The species is highly variable, and many local forms and subspecies have been named. It spreads slowly by rhizome and self-seeds where the ground is open. The divided foliage dies back to the rootstock each winter. Its loose habit and finely cut leaves contrast with the bolder foliage of meadow companions, though tall stems may lean in exposed sites.

Native Range

Native to Europe, North Africa, and temperate Asia. It grows in grassland, on rocky slopes and dunes, and in open woodland, often on lime-rich soils.

Suggested Uses

Grown in mixed borders, gravel gardens, and naturalistic meadow plantings for its divided foliage and airy flower heads. It is used among grasses and other perennials in prairie-style schemes. The cut foliage is used in flower arranging.

How to Identify

Identified by finely divided, blue-green leaves with many small rounded leaflets resembling maidenhair fern, and by airy heads of petal-less flowers with dangling yellow stamens. The flowers hang downward and lack the showy sepals of some other meadow-rues. Plant height varies widely, from 12 inches to 5 feet (30-150 cm), across its range.

Appearance

Size & Dimensions

Height1' - 5'

Width/Spread1' - 2'

Colors

Flower Colors

Foliage Colors

Fall Foliage Colors

Bloom Information

Bloom Period

~6 weeks

Summer

Petal-less greenish-yellow flowers open from June to August in loose, branched heads. Each flower hangs downward with a tassel of yellow stamens that release pollen to the wind. The display lasts several weeks before small dry fruits form.

Detailed Descriptions

Foliage Description

blue-green

Growing Conditions

Sun Requirements

SunFull Sun SunPartial Shade

Requires 4-10 hours of direct sunlight daily

• Full Sun: 6+ hours of direct sunlight

• Partial Shade: 3-6 hours of direct sunlight

• Full Shade: Less than 3 hours of direct sunlight

Soil Requirements

pH Range6.0 - 8.0(Neutral)

357912

Soil Types

loam chalk sand

Drainagewell drained

Water & Climate

Water Needs

Medium

Frost Tolerance

hardy

Time to Maturity

2-3 years

Care & Maintenance

Care Guide

Thalictrum minus grows in moist, well-drained soils in full sun to partial shade and tolerates a soil pH from about 6.0 to 8.0. It withstands exposed and coastal sites and is hardy to USDA zone 5. The plant spreads slowly by rhizome and can self-seed where soil is bare. Tall stems in rich or shaded ground may lean and can be staked. It dies back each autumn and regrows from the base in spring. Established clumps can be lifted and divided in spring.

Pruning

Spent stems can be cut to the ground after flowering, or left to set seed. Dead foliage is cleared in late autumn or early spring as new growth appears. No other cutting is needed.

⚠️ Toxicity Warning

Unknown