Soil: Coral bells like a neutral to slightly acid soil pH, somewhere between 6.0 and 7.0. Good drainage is a must, especially in shaded areas. They do well in soil where some organic matter has been added.
Light: As a general rule, Heucheras do well in shade, but for the highly colored varieties, some morning sun will bring out more intense coloring. The color can wash out in full sun, and too much heat and light can cause the leaves to scorch.
Water: Average -- better too dry than too wet when established. Keep the soil evenly moist, but not consistently wet to prevent root rot. To reduce the risk of foliar disease, Heuchera require watering during the early morning so any excess moisture can evaporate before evening. Drip irrigation effectively delivers moisture directly to the soil, further reducing the plant's vulnerability to disease.
Spacing: 1.5 ft
Fertilizing: Use good quality compost, or well aged livestock manure, or a combination of the two. Apply a few pounds for each plant, each year or two. On poor soils, top dress every year, or every other year on moderate quality soils. Spreading a 2-inch layer of mulch over the soil surrounding Heuchera helps insulate the soil during winter, and improve moisture retention. About 3 inches of space between the plant's crown and the mulch allows air circulation, which prevents rotting and disease. Replenishing the mulch throughout the year ensures proper winter protection, and hinders the establishment of competitive weeds.  Heuchera does not require fertilization during the fall or winter months.
Winterizing: Winter mulching will prevent the freezing and thawing that can heave plants roots.
Maintenance & Pruning: Cut back the entire flower stalk after flowering to put the plants energy into growing more leaves.  Divide Coral bells every 3-5 years to keep them from dying out in the center.