Ground covers, Perennials
Of the European natives commonly grown in North America, most are ground covers that bloom from spring to early summer.
Popular and useful groundcover, though it will escape into lawns unless contained. Spreads quickly by runners, making a mat of leaves in the basic species. Each oval to tongue-shaped leaf is 2–3 in. wide in full sun, to 4 in. wide in part shade; entire foliage mass tops out at around 4 in. high. Blue flowers in 6-in. spikes appear in spring and early summer.
Plant 1 ft. apart in spring or early fall. Subject to root rots and fungal diseases where drainage or air circulation is poor. Mow or trim off old flower spikes.
Many varieties of this species are available, some sold under several names. choices. Varieties with bronzy or metallic-looking leaves keep color best in sun.
Blackish purple foliage with scalloped edges.Bronze Beauty
Large, bronzy leaves and deep blue flower spikes.Burgundy Glow
Reddish purple foliage variegated with white and pink.Catlin’s Giant
Large, bronzy green leaves and flower spikes to 8 in. tall.