Tiarella (tye-uh-rell-uh) False Mitrewort, Foam Flowers; Saxifragaceae Family. Dainty perennials, native to moist, rich woodlands of temperate North America. Tiarella cordifolia (kor-dif-foh-lee-uh) is on the preservation list of some states.
Tiarellas, the foam flower, prefer woodland conditions: humus-rich, moisture retentive soil and dappled to full shade. Tiarella, or foam flower, is sometimes mistakenly called false miterwort because of its similarity to Mitella (miterwort).
Tiarellas are easy to grow in average, medium moisture, well-drained soils; but they prefer humus-rich, moisture retentive soil and dappled to full shade woodland conditions. Consistently wet soils, particularly in winter, may cause crown rot. If properly sited (up to zone 5), they will keep their nice foliage all winter long, shedding it when the warmer days of spring arrive. Tiarellas may be deer resistant.
Attributes: Border plants, Container, Cut flower or foliage, Edging, Evergreen, Fragrant flowers, Mass Planting.
PLANTING: Set plants 10 to 12 inches apart. Choose a shady or partly shady location, and a soil that is slightly acid, moisture-retentive and has been enriched with organic matter.
MAINTENANCE: Make certain that plants are kept well-watered during any dry spell. Foliage is evergreen in the south and old leaves should be trimmed back in early spring. Year round mulch is recommended.