Epimedium × warleyense is a hybrid perennial forming low, spreading mats valued for its copper-orange spring flowers and year-round foliage. Named after Warley Place garden in Essex, England, it excels in dry shade where few ground covers survive, making it a practical solution under established trees or along dry north-facing borders.
The plant spreads slowly by rhizomes, gradually suppressing weeds once established. Semi-evergreen in most climates, its heart-shaped leaves take on bronze and reddish tones through winter. Old foliage should be cut to the ground in late winter before new growth and flowers emerge - leaving it in place obscures the spring display. Prefers humus-rich, well-drained soil with a mildly acidic to neutral pH; mulching with leaf mold maintains moisture and feeds the root system. Tolerates considerable drought once established but benefits from supplemental water through the first season.
Epimedium belongs to a genus used in traditional Chinese medicine under the names yin yang huo and horny goat weed. The compound icariin, extracted from Epimedium species, has been studied in relation to bone density and sexual function, though E. × warleyense is a garden hybrid not harvested commercially for these purposes.
Root rot
Plants wilt, yellow, and stunt even in moist soil; lower stems and roots turn brown, soft, and mushy and the plant may collapse. Most common in heavy, wet, or poorly drained ground.
Improve drainage and stop overwatering, and never plant too deep. Lift and destroy badly affected plants along with the soil around the roots. Grow in raised or free-draining beds to prevent it returning.
Fungal leaf spot
Brown or purplish spots on the leaves, often ringed with a yellow halo, that spread and merge in warm, humid, or wet weather; heavily spotted leaves yellow and drop early.
Pick off spotted leaves and clear fallen debris to remove overwintering spores. Improve air circulation by thinning, and water at the base so foliage dries quickly. If it persists, apply a copper- or sulfur-based fungicide at the first sign.