Heuchera americana (American alum root) — perennial

Overview

Heuchera americana is a perennial in the genus Heuchera, part of the Saxifragaceae family. It typically grows around 0.5 m tall. Heuchera americana grows best in full sun, and tolerates sandy and loamy soils. Its UK hardiness is rated H7. It is native to E USA.

About the genus

Heuchera is a genus of largely evergreen perennial plants in the family Saxifragaceae. All species are native to North America except for Heuchera sichotensis, native to the Russian Far East. Common names include alumroot and coral bells.

Wikipedia contributors, "Heuchera", CC BY-SA 4.0 — Heuchera

In the garden

Heuchera americana originates from the eastern United States and grows as a compact perennial to roughly 0.5 metre. It belongs to the Saxifrage family and, in a UK context, is classed H7 — fully hardy — so it tolerates the coldest domestic garden winters and aligns with USDA zones 4–9. For site selection choose a sunny spot and a sandy or loamy soil that keeps some moisture without waterlogging; the plant prefers moist but well‑drained conditions. Allow adequate room for a 0.5 metre clump and avoid heavy, persistently wet ground. In cultivation, expect flowering from May to August when airy stems rise above the foliage; cutting back spent flower stems once flowering finishes helps keep the clump tidy. Use Heuchera americana at the front of a mixed border, in gravel or sandier soils, or in containers where drainage can be controlled; its compact height makes it suitable where low, seasonal flower stems are wanted without overtopping neighbouring plants. If clumps thicken over time, lift and divide in spring to refresh vigour and maintain a neat outline.