How-to Guide
How to Grow Heuchera (Coral Bells)
The short answer
Grow heuchera in partial shade — morning sun and afternoon shade is ideal, especially in hot climates — in rich, organic, well-drained soil kept evenly moist but never soggy. In full sun the plants need extra water to keep from drying out and the darkest-leaved varieties can scorch.
Because heuchera is shallow-rooted, it is prone to frost heaving: winter freeze-thaw cycles push the woody crown up out of the soil, where it dries out and dies. The fix is 2 to 3 inches of mulch applied once the ground has frozen, plus a check in early spring — press or replant any lifted crowns immediately. Divide clumps every 3 to 4 years, since undivided plants become woody and short-lived.
Light, soil, and water
Partial shade suits most heucheras; in the South they do best with morning sunlight and afternoon shade. Many modern cultivars tolerate more sun in cool climates, but if planted in full sun, extra moisture must be supplied to prevent drying out.
Give them rich, organic, well-drained soil with an even supply of moisture that is never soggy — soggy crowns rot, and drought crisps the leaf edges. A slightly acidic soil is preferred.
Heuchera earns its place as edging and in shade containers on foliage alone — the wiry flower stems are a bonus — so treat leaf quality as the goal when you choose the site.
Frost heaving: the classic heuchera failure, and the fix
Heuchera roots are shallow and fibrous, which makes the plants prone to frost heaving — repeated freezing and thawing physically pushes the rootball up until the crown sits proud of the soil, where cold and dry air kill it.
Prevention is simple: once the ground has frozen, add 2 to 3 inches of mulch (shredded leaves, fine bark, or compost) around the plants as winter protection. Applying it after freeze-up, not before, keeps the soil temperature steady instead of trapping warmth and moisture at the crown.
In early spring, check each plant: if a crown has lifted, replant or firm it back down to root depth as soon as possible. A heaved heuchera caught early recovers; one left sitting on the surface usually does not.
Division keeps them alive
Heucheras are usually short-lived perennials unless they are divided every 3 to 4 years. Over time the crown grows woody and rises into a leggy trunk with a tired tuft of leaves on top.
Divide in spring: lift the clump, split it into pieces with healthy roots and foliage, discard the oldest woody core, and replant the divisions at crown level. Spring division renews the mounding habit and doubles as free plants.
Sources
Reviewed 2026-07-18. We cite university Extension, government, and established horticultural sources — and never invent pesticide rates or dangerous treatments.
- Chicago Botanic Garden — Coral Bells (Heuchera) — Prefers even, never soggy moisture in rich, organic, well-drained soil; in full sun extra moisture must be supplied; shallow rooted and prone to frost heaving — add 2 to 3 inches of mulch once the ground has frozen; large woody plants benefit from spring division.
- N.C. Cooperative Extension (Brunswick County) — Heuchera (Coral Bells, Alumroot) — In the South grows best in partial shade with morning sun and afternoon shade, in moist well-drained slightly acidic soil; mulch protects roots in winter; usually short-lived perennials unless divided every 3 to 4 years.