Growing Barrenwort in a pot

Barrenwort is a low-maintenance groundcover once established, but consistent moisture is important, especially in the first year. Water regularly during dry spells in spring and summer to keep the soil evenly moist—the moderate water requirement means the ground should never dry out completely, but equally it must not sit wet. In deep shade or heavy soil, natural rainfall is often sufficient from autumn through spring. Reduce watering in winter when the plant is dormant. Feed once a year in March, just as new growth begins. Scatter a general-purpose granular fertiliser such as blood, fish and bone or a balanced slow-release feed around the base of each clump, following the manufacturer's rate. Alternatively, top-dress with a 3–5 cm layer of well-rotted compost or leaf mould, which feeds the soil and improves structure. Avoid high-nitrogen feeds, which promote soft leaf growth at the expense of flowers. Barrenwort is fully hardy in zones 5a–9a and needs no special winter protection in temperate Europe. The foliage may bronze attractively in cold weather but remains on the plant until you cut it back in late winter. Refresh the mulch layer each autumn to suppress weeds and conserve moisture through winter. Pests are rarely a problem. Vine weevil larvae occasionally attack the roots in container-grown plants, so check for notching on leaf edges and treat the soil with a biological control if necessary. Slugs may nibble young spring foliage but seldom cause serious damage. Diseases are uncommon; good drainage and adequate air circulation prevent most issues.