How to Grow Heuchera Plants in your Garden

Gardener's HQ Guide to Growing Alum root and Coral bells

Heuchera are clumpy hardy perennials that range from 15 to 90 cm (6 to 36 inches) in height.

They are treasured for their foliage of bronze, green or silver toothed leaves, and carry flowers atop thin almost wire like stems.

When the Heuchera plant blooms depends on the species, and it may be from anytime from the latter months of spring to the early months of autumn.

Coral bells

Heuchera photograph by Howard Dickins.

Some of the common names for Heuchera include Coral bells and Alum root.

Heuchera Growing and Care Guide

Common Names: Alum root, Coral bells.
Life Cycle: Hardy perennial.
Height: 6 to 36 inches (15 to 90 cm).
Native: Northern America.
Growing Region: Zones 3 to 10.

Flowers: Species dependent: Late spring and/or summer and/or early autumn.
Flower Details: Red, pink, salmon, white, green. Clusters. Upright inflorescence.
green; plants are grown for their attractive silvery or bronze spearheads.
Foliage: Evergreen. Palmate. Toothed. Scalloped. Attractive silver, bronze, purple or green foliage; variegated.

Sow Outside: Surface. Start of spring or towards the end of autumn. Spacing 9 to 12 inches (23 to 30 cm).
Sow Inside: Germination time: one week to two months. Temperature: 60 to 70°F (16 to 21°C) in the light. Two months in advance. Transplant outdoors following the last frost.

Requirements and care: Full sunlight (cool areas) or partial shade. Good drainage.
Soil pH 6.0 to 7.0. Fertile soil, light soil. Does not tolerate wet soils. Tidy stems once flowering has completed. Should be divided after three or four years to maintain vigour. When dividing add organic matter in order to enrich soil. Propagate: by dividing in the spring in cooler areas or the autumn in warmer areas.
Miscellaneous: Traditionally used as a tonic to help with digestion by native Americans.

How to Grow Coral Bells and other Heuchera Plants in the Garden

If planning to grow coral bells outdoors from the off, it is best to sow out the seed on the surface in either early spring or late autumn.

Members of the Heuchera plant genus like to grow in partially shaded parts of the garden that have good drainage. Locate into an area with a light and fertile soil. Ideally with a slightly acidic to neutral soil of pH 6 to 7.

If you prefer to first grow Coral bells and other Heuchera members such as Alum root indoors first, then they should be started about two to two and a half months in advance.

They should take from two to eight weeks to germinate at 15 to 21 degrees Celsius (59 to 70°F) in the light.

Once ready they should be transplanted into the garden at a spacing of about 25 cm (10 inches) following the last frost of spring.

Caring for Coral bells and other Heuchera Plants

Coral bells are fairly easy to grow and maintain. The flowering stems should be removed after b;ppmomh has finished. Mulch is required at the beginning of spring.

The plants need to be divided every four years or so to maintain vigour. If you require more Heuchera plants then divide in the spring.

Common Questions

How many members does the Heuchera genus have?

The Heuchera genus contains 37 species. They are especially admired for their colorful foliage.

Do members of Heuchera make a good garden or landscaping plant?

Definitely! Heuchera, commonly known as Coral Bells, are loved by gardeners for their vibrant leaves and their ability to thrive in shady areas.

Which Heuchera species are most frequently grown by gardeners?

The Heuchera 'Palace Purple' is a popular choice among gardeners due to its unique, dark, purple-hued leaves.

Are members of the Heuchera plant genus fragrant?

While Heuchera are not particularly known for their fragrance, they are highly appreciated for their colorful foliage and delicate, bell-shaped flowers.

What is the perfect location to grow Heuchera?

Heuchera plants prefer part shade to full shade and thrive in well-drained soil that is rich in organic matter.

Is Heuchera invasive in the USA, if so in which states?

Currently, Heuchera is not considered invasive in the USA.

How do I remove Heuchera plants from my garden?

To remove Heuchera, dig up the plants carefully, ensuring you remove all roots to prevent re-growth.


The Heuchera genus, commonly known as coral bells or alumroot, belongs to the Saxifragaceae family. Native to North America, these perennials are admired for their foliage and delicate bell-shaped flowers. Notable species include Heuchera americana and Heuchera sanguinea.

Heuchera prefers partial shade and well-drained, rich soil. Regular watering is needed, but avoid waterlogged conditions. Propagation is typically done by seed or division in the spring or fall.

I hope that you enjoyed this guide on how to grow Heuchera plants. You may also enjoy my gardening guides on how to grow Muscari, Cardiocrinum plant, and Bulbocodium plants.