Barrenwort
Epimedium grandiflorum
Barrenwort is a tough, low groundcover for dry shade, with delicate spring flowers and heart-shaped leaves that often emerge and finish the season tinted red. It thrives where little else will.
- Light
- Part to full shade
- Water
- Moderate; evenly moist
- Difficulty
- Easy
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Overview
Barrenwort (Epimedium) is a clump-forming perennial grown for its dainty, spurred spring flowers and its attractive heart-shaped foliage. The flowers, in yellow, white, pink, lilac, or red, hover on wiry stems and have given rise to nicknames like fairy wings and bishop's hat.
It is one of the best plants for dry shade, including the difficult ground beneath trees, where its tough roots compete well. Many types are semi-evergreen, and new leaves often emerge bronze or red-tinted, coloring again in fall.
Long-lived and low-maintenance, barrenwort forms a refined, weed-suppressing carpet in the woodland garden.
How to identify it
- Flowers: Small, delicate, often spurred flowers in yellow, white, pink, rose, or lilac on thin wiry stems in spring
- Leaves: Heart-shaped to arrow-shaped leaflets, often with spiny-toothed edges; new and autumn foliage frequently flushed red or bronze
- Height: Low mounds 8-12 in tall, spreading slowly by rhizomes
- Habit: Semi-evergreen to evergreen clumping groundcover
Care & growing
- Light: Part to full shade; ideal beneath trees and shrubs
- Water: Prefers evenly moist soil but, once established, is notably tolerant of dry shade
- Soil: Humus-rich, well-drained soil is best, though it adapts to poorer ground
- Temperature: Hardy roughly USDA zones 4-8 depending on species
- Feeding: Light; topdress with leaf mold or compost
- Propagation: By division in early spring or after flowering; cut back old foliage in late winter so the new flowers and leaves show clearly
Habitat & origin
Barrenwort species are native to woodlands of East Asia (especially China, Japan, and Korea) and parts of the Mediterranean and Caucasus, growing in shaded forests and on rocky slopes.
In gardens it is valued as a groundcover for shade and woodland borders, dry shade under trees, and as elegant edging along shaded paths.
Uses & benefits
Ornamental: A premier groundcover for dry shade, prized for spring flowers, year-round foliage, and seasonal red leaf tints.
Ecological: The early flowers offer nectar to bees emerging in spring, and the dense foliage suppresses weeds.
Medicinal: Several Asian Epimedium species are used in traditional Chinese medicine under the name horny goat weed, valued historically as a tonic, though garden plants are grown ornamentally.
Frequently asked questions
Will barrenwort grow in dry shade under trees?
Yes. Once established it is one of the most reliable groundcovers for dry shade, including the challenging soil beneath trees and large shrubs.
Should I cut back barrenwort foliage?
For deciduous and semi-evergreen types, shear off the old leaves in late winter before new growth begins so the spring flowers are not hidden by tatty foliage.
Is barrenwort the same as horny goat weed?
They are the same genus, Epimedium. Several Asian species used in traditional herbal medicine are called horny goat weed, while many ornamental hybrids are grown purely for the garden.
How fast does barrenwort spread?
Most form slowly expanding clumps rather than running aggressively, making them well-behaved, long-lived groundcovers. Divide them to propagate or speed up coverage.
Barrenwort guides
In-depth guides for identifying, growing, and caring for Barrenwort.
