Yellow barrenwort

Sun

Partial shade to full shade; gentle morning sun is suitable, but avoid hot afternoon sun.

Water

Water regularly through the first growing season. Once established, it tolerates dry shade, but water during prolonged drought to prevent leaf scorch and early dormancy.

Soil

Humus-rich, well-drained soil; tolerates clay if it is not waterlogged and accepts acidic, neutral or mildly alkaline conditions.

Height

1-1.5 ft (0.3-0.45 m)

Spread

1.5-3 ft (0.45-0.9 m), gradually forming wider colonies

Flowers

Mid- to late spring; small, nodding, pale sulphur-yellow flowers held above or among the emerging leaves.

Foliage

Evergreen. Compound leaves with heart-shaped, finely toothed leaflets; new growth is bronze-red, maturing to green and often taking on bronze or reddish tones in autumn.

Growth

Moderate; spreads steadily by shallow rhizomes once established.

Care needed

Low

• Pollinators
• Deer resistant
• Drought tolerant
• Wildlife
• Low allergen

Northern hemisphere months. In Australia, shift them by six.

Difficulty

Easy

Toughness

Very tough

Pick your zone, country, light and whether you have pets.

1. Planting day

   1 ft (0.3 m)

2. After 1 year

   1.1 ft (0.32 m)

3. After 2 years

   1.1 ft (0.35 m)

4. After 3 years

   1.2 ft (0.38 m)

   full size

About 3 years to full size.

From a typical nursery size, at an average rate for this kind of plant. A rule of thumb, not a forecast.

Cats and dogs

Safe

Growth rate

Moderate

• Plant in partial or full shade, away from strong afternoon sun.
• Water deeply during establishment and during extended dry spells.
• Apply a thin layer of leaf mould or garden compost in spring, keeping crowns uncovered.
• Avoid heavy feeding; an annual compost mulch is usually enough.
• Divide congested clumps or remove spreading rhizomes when they outgrow their space.

Pruning. In late winter or very early spring, cut old leaves close to the ground before flower stems and new foliage emerge. If growth has already started, remove old leaves individually to avoid cutting off the flowers.

Late winter

Remove old foliage before the new flower stems emerge.

Early spring

Apply a thin mulch of leaf mould or compost and water if the soil is dry.

Spring

Plant new clumps and keep their root zones moist while they establish.

Summer

Water during prolonged drought, especially beneath thirsty trees.

Early autumn

Divide established clumps if needed, replant promptly and water well.

Late autumn

Leave healthy foliage in place for winter cover; it may remain evergreen in mild climates but dies back in colder ones.

• Plant in broad drifts beneath deciduous trees for spring flowers followed by a low carpet of foliage.
• Edge shaded paths with it, where the emerging bronze leaves and small flowers can be seen closely.
• Combine with ferns, hellebores and hostas for contrasting leaf shapes through the growing season.
• Grow over spring bulbs to soften their fading foliage without needing frequent disturbance.

Garden styles it suits: Woodland, English country, Cottage garden, Japanese, Low-maintenance and Secret garden.

Plant it with: Hellebores, Hostas, Japanese painted fern, Solomon's seal, Siberian bugloss and Snowdrops.

Wildlife: Spring flowers can provide food for visiting bees. Dense established foliage offers shelter for small garden invertebrates; deer and rabbits usually leave it alone, though no plant is completely browse-proof.

• Scorched or brown-edged leaves: provide more shade and water deeply during drought.
• Crown or root rot in waterlogged soil: improve drainage or move the plant to a better-drained position.
• Slugs and snails on tender new growth: check emerging shoots and use hand-picking or labelled iron-phosphate bait where necessary.
• Few visible flowers after late cutting: remove old foliage earlier next year, before flower stems emerge.

Not known to be toxic to people, cats, dogs or horses. No particular part is established as poisonous, but it is not a food plant and reliable information on substantial ingestion is limited.

• Red barrenwort (Epimedium × rubrum)

  Has red and pale yellow or cream flowers rather than the predominantly pale yellow flowers of 'Sulphureum'; young leaves often have conspicuous red margins.

• Frohnleiten barrenwort (Epimedium × perralchicum 'Frohnleiten')

  Has stronger golden-yellow flowers and conspicuously bronze-marked young foliage; it usually makes a denser, more vigorous evergreen carpet.

'Sulphureum' means sulphur-yellow, referring to the flowers, while barrenwort is an old common name associated with a supposed effect on fertility.

Propagation. Divide clumps in early spring or early autumn, keeping roots and several growth buds on each piece. Division preserves 'Sulphureum'; seedlings will not reliably match the cultivar.

Accepted botanical name

Epimedium versicolor

Sources: GBIF (CC BY 4.0) and Trefle (CC BY 4.0). The care and design notes are LandscapeGPT's own.