Ornamental · Berberidaceae
Barrenwort
Epimedium grandiflorum
Forgiving, deer-proof, and happy in dry shade, barrenwort quietly covers the ground where little else will settle.
Partial shade
Every 7–14 days
USDA 5–8
10–18 in · 25–46 cm
Overview
If you have a shady, root-filled patch under trees and shrubs where nothing seems content, barrenwort is the plant that will reward you. It is part of the barberry family and builds slow, well-behaved clumps of wiry stems and heart-shaped leaflets. Come spring it lifts up airy sprays of small spurred flowers, the charming blooms that earned it names like bishop's hat and fairy wings.
Lovely as the flowers are, the leaves are the longer pleasure. Fresh growth often unfurls with a red or bronze tint before it eases into green, and many kinds keep their leaves well into winter. Trim the tired old foliage to the ground in late winter and the new spring flush comes through clean, with the flowers standing clear and proud above it.
Best of all, once it settles in barrenwort asks almost nothing of you. It shrugs off deer and rabbits, copes happily with the dry shade beneath established trees, and spreads in its own gentle way by rhizome into a low, knitting groundcover. Give it a season or two to establish, and it will quietly earn its place for decades to come.
Care
The short version: give it part to full shade in loose, acidic, organically rich soil, keep it watered while it settles in, and divide the clumps every few years so they stay full and vigorous.
Light
Barrenwort is happiest in part to full shade, the soft dappled light you find under trees and along the north side of a wall. A little gentle morning sun is fine, but hot afternoon sun will scorch the leaf edges, especially when the soil is dry.
Water
While new plants are rooting in, keep them evenly moist, watering every 7 to 14 days as the top half of the soil dries out. Once they have settled, the rhizomes hold enough moisture to carry them through dry shade and short dry spells, though sunnier northern spots appreciate a little extra water in summer.
Soil
Give it loose, well-drained, organically rich loam on the acidic side, around a pH of 5.0 to 7.0. It is not keen on heavy wet ground and will not tolerate alkaline soil, so dig in some compost or leaf mold before you plant and it will thank you.
Temperature
This is a tough, cold-hardy perennial that copes with roughly -20°F to 86°F (-29°C to 30°C). No winter protection is needed anywhere in its range; it simply goes dormant or holds on to weathered leaves through the cold.
Humidity
Ordinary outdoor humidity suits it just fine, and there is no figure to fuss over. What truly counts is steady soil moisture down at the roots rather than dampness in the air.
Feeding
Feed it lightly in spring as the new growth appears, using a balanced fertilizer or a gentle top-dressing of compost or organic matter. It is a modest eater, so once a season is all it asks of you.
Pruning
Cut the old or winter-worn foliage back in late winter, just before the new growth pushes through, so the spring flowers can shine. Apart from that one yearly trim, it needs no other pruning from you.
Repotting
In the ground, lift and divide the clumps every 3 to 4 years in early spring or fall to keep them lively. Fading flowers, weaker growth, or a crowded, congested center are the friendly signs that it is time.
Size & spacing
Plants grow to about 10 to 18 inches (25 to 46 cm) tall and spread 12 to 24 inches (30 to 61 cm) across. Set them a foot or two apart and, in their own unhurried way, they will close the gaps into one continuous cover.
When to plant
Barrenwort is hardy and patient, so you have a comfortable window to work with. Settle new plants into the ground in spring or fall while the soil stays cool and moist, then watch for the delicate flowers from April into June before the foliage carries the show through the rest of the year.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Plant: Spring or fall
- Harvest: April to June (spring)
Hardiness
USDA hardiness zones: 5–8
Temperature: down to -29°C
Troubleshooting
Barrenwort stays remarkably easygoing, and when something does go awry it nearly always shows on the leaves. A few familiar pests and the occasional virus cover almost all of it. Find the picture that matches yours below, then step in early before any trouble has a chance to spread.
Leaves looking mottled, streaked, or oddly twisted
If you spot patchy yellow-green mottling, the likely answer is mosaic virus, and aphids are the ones moving it from plant to plant. There is no cure, so the kindest thing for the rest of your garden is to lift the badly affected clumps and bin them rather than compost them. Stay on top of aphids on the soft new growth, and only ever divide from a plant that looks clean and healthy.
Fix:
- Remove and destroy severely infected plants since there is no cure for the virus
- Control aphid vectors to limit spread
- Avoid propagating from infected plants
Ragged holes chewed right through the leaves
Holes and torn edges with shiny slime trails nearby usually mean slugs, which do their feeding after dark, while vine weevils leave their own neat little notches around the margins. Take heart, this is easy to manage: go out in the evening and pick the slugs off by hand, or set a ring of bait or a barrier around the clumps. Tidying away damp leaf litter takes away the cool, moist cover both pests love to hide in.
Fix:
- Hand-pick slugs in the evening
- Use slug baits or barriers around clumps
- Remove debris that shelters pests
Browned, crispy edges along the leaves
Leaf scorch tends to creep in when a plant is sitting in hot afternoon sun, and thirsty soil only makes it worse. The good news is that clumps tucked into proper shade stay clean and pretty. Move a struggling plant into dappled or full shade, be a little more generous with water in the sunnier spots, and a layer of mulch will help keep that moisture right where the roots want it.
Fix:
- Move or site plants in part to full shade
- Provide additional summer water in sunnier locations
- Mulch to conserve soil moisture
Toxicity
Here is some reassuring news for homes with pets and little ones: barrenwort is not poisonous. It holds no toxin that would harm cats, dogs, horses, or livestock, and its young leaves are even eaten as a cooked green. Plant it wherever you like and let a curious nibble go without a second thought.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
You can relax with curious cats around, because barrenwort is safe for cats. An exploratory nibble holds no toxin that would make a cat unwell.
Dogs None
A dog can dig and chew near a planting with nothing to worry about, since not one part of it is poisonous to them.
Horses None
Horses are in safe hands here. Should a grazing horse take a mouthful, the foliage is not toxic and will do no harm.
Rabbits None
Rabbits tend to pass it by, which is a quiet bonus for you rather than a worry. It is rabbit-resistant and non-toxic, so an occasional bite causes no trouble.
Livestock None
Grazing cattle, goats, and sheep face no poisoning from barrenwort, as it holds nothing that would upset them.
Birds None
Birds that peck at the leaves or forage nearby are in no danger from this plant.
People None
People are perfectly safe around barrenwort, and the young leaves are even eaten as a cooked green once soaked and boiled. Until you know that preparation well, simply enjoy it as an ornamental.
No special handling precautions needed for a non-toxic ornamental groundcover.
Varieties
There are hundreds of barrenwort selections to explore, bred for flower color and leaf shape. A handful turn up again and again in shade gardens, and these are well worth getting to know by name.
Epimedium × rubrum
The red barrenwort offers crimson and pale-yellow bicolor flowers held above spring leaves that blush red as they open.
Epimedium × youngianum Niveum
If you want something tidy and bright for a shaded corner, this snowy barrenwort stays compact and opens pure white flowers.
Epimedium × versicolor Sulphureum
This easygoing spreader gives you soft sulphur-yellow flowers and tends to keep its leaves through mild winters.
Amber Queen
Amber Queen rewards you with a long run of amber-yellow flowers carried on tall, spurred stems.
Companions
Plant near
Hosta: Shares the same part-to-full-shade, moist, organically rich woodland conditions and contrasts in foliage texture.
Ferns: Thrives in the same shaded, humus-rich sites and complements the delicate barrenwort foliage.
Hellebore: Another shade-loving, deer-resistant perennial that pairs well in woodland borders with similar care needs.
How to propagate
Barrenwort multiplies in the gentlest, easiest way there is, simply by splitting a settled clump. Lift it, divide it, replant the pieces, and you have several plants where you started with one.
DivisionEasy
Early spring or fall · One to two growing seasons
Making more barrenwort is wonderfully simple, and division is all it takes. Gently lift a settled clump in early spring or fall, then cut the rhizomes into pieces that each keep healthy roots and a few buds, and pop them back into the ground right away. Repeat every 3 to 4 years to keep the parent strong, and allow each new piece one to two growing seasons to find its feet and flower with confidence.
Myths
Barrenwort is poisonous to cats and dogs.
You can set that worry aside: the ASPCA does not list barrenwort among its toxic plants, and trusted horticultural sources report no toxicity at all. It is a deer- and rabbit-resistant shade groundcover, and its young leaves are even eaten as a cooked green. Barrenwort is safe to grow around pets and children.