When to plant Barrenwort?
Best month and method — Epimedium × rubrum
Plant your barrenwort in March, April, September and October — the optimal month is usually September.
The next planting window is September.

Spacing
35 cm
≈ 8 plants
For an X m² border, calculate: X × 8 plants.
Step by step: plant barrenwort
Barrenwort thrives in partial to full shade, making it ideal for underplanting beneath trees, along shaded borders, or in woodland gardens where many other plants struggle. Choose a spot sheltered from harsh winds and strong midday sun, which can scorch the foliage. The soil should be loamy or rich in organic matter—peat-based soils suit it well—and must retain moisture without becoming waterlogged. Before planting, dig over the area to a spade's depth and incorporate plenty of well-rotted compost or leaf mould to improve structure and fertility. Plant barrenwort in March, April, September, or October when the soil is workable and temperatures are mild. Space plants 35 cm apart to allow the rhizomes to spread and form a dense, weed-suppressing mat over time. Dig a planting hole slightly wider than the root ball and set the plant at the same depth it was growing in its pot—avoid burying the crown too deeply. Firm the soil gently around the roots to eliminate air pockets. Water thoroughly immediately after planting to settle the soil and help roots establish. Apply a 5 cm layer of organic mulch such as leaf mould, composted bark, or well-rotted manure around the plants, keeping it clear of the crown itself. This conserves moisture, suppresses weeds, and mimics the woodland floor conditions barrenwort prefers. Keep the soil consistently moist for the first growing season, especially during dry spells in spring and summer, until the plants are well rooted and beginning to spread.