Oneleaf Foamflower

Tiarella trifoliata ssp. unifoliata

perennial herbView on Calscape

Care

Sun

part shade

Water

moderate

Size

1–1ft tall

Bloom

Jun-Aug

Container

Friendly

Care Guide

Planting

Plant your Oneleaf Foamflower in partial shade - it's a forest understory plant and won't thrive in full sun. It prefers moist conditions, so choose a spot with consistently damp soil; this plant hails from wetland-riparian areas of western North America and expects reliable moisture. Space plants about 6–12 inches apart if using them as a groundcover or lawn alternative. Plant in spring or fall to give the roots time to establish before extreme temperatures arrive.

After Planting

Water weekly during your first summer to help it establish, then transition to a moderate watering schedule once it's settled - the goal is keeping soil consistently moist but not waterlogged. This is a moderate-care plant that will slow down in late fall and winter; expect fresh growth and delicate white flowers in summer (June through August). The biggest mistake Bay Area gardeners make is planting this in too much sun or allowing the soil to dry out completely between waterings.

Visit Calscape for more information about Oneleaf Foamflower

Endangered & Threatened Species Supported

Sitka Bumble BeeBombus sitkensis

Sitka bumble bee, declining populations

CA: Threatened

Wildlife Supported