Common Names: Island alum root
Type: Evergreen perennial
Size: 2 ft. high, 3 ft. wide; flower spikes to 3 ft.
Flowers: Hundreds of white or pink flowers in clusters 1.5 to 2.5 ft. long, winter to spring; leaves are shiny, green, heart-shaped, and 3–4 in. across.
Uses: Casual ground cover, near oaks, on slopes, rock gardens, borders. Fire resistive.
Wildlife: Attracts hummingbirds. Deer and rabbits like.
Soil: Tolerates clay soil; should be well-drained.
Water: Low summer water.
Sun: Full sun OK; better in some shade.
Pruning: Only deadhead back in late fall. Old and declining plants can be cut back and will recover next spring. Replace whole plant when too woody.
Pests & Diseases: Damp shade can encourage fungal diseases. Black Vine Weevil larvae can bore into the crowns and roots.
Notes: Native to the coastal islands of California where it is found in wooded canyons and on cliff faces. Divide clumps every 3 or 4 years in fall. Hardy to 15° F.