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Barrenwort

Epimedium grandiflorum

Also called Bishop's Hat, Large Flowered Barrenwort

Barrenwort
Photo: Sphl, CC BY-SA 3.0

Barrenwort (Epimedium grandiflorum) is a deciduous perennial woodland groundcover from Japan and Korea, grown for its heart-shaped leaves and spring spurred flowers. It is easy to grow in shade and is tough once established.

Family
Berberidaceae (Barberry family)
Grows as
Bulb
Light
Part shade, Shade
Water
Keep soil evenly moist while establishing, then water in dry spells; tolerates drier shade once mature.
Soil
Moist, humus-rich, well-drained soil such as leaf mould or garden compost.
Temperature
Hardy to about -20 °C; grows well in temperate gardens.
How easy
Easy
Native range
Japan (Honshu)
Climate
temperate

About

Epimedium grandiflorum, the large flowered barrenwort, or bishop's hat, is a species of flowering plant in the family Berberidaceae, native to Japan and Korea.

How to grow it

Numerous cultivars have been selected for garden use, of which the following have gained the Royal Horticultural Society's Award of Garden Merit:

E. grandiflorum 'Akagi-Zakura'

Uses

It is commonly packed in a capsule with other ingredients or sold as herbal flakes or powder with the name "horny goat weed".

Other Epimedium plants

Epimedium acuminatum · Barrenwort · Epimedium fargesii · Epimedium franchetii · Caucasian Barrenwort · Rowdy Lamb Herb

Text excerpted from the Wikipedia article Epimedium grandiflorum by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.

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