The Heuchera is easy to care for, does well in cool, well-drained and moist soils, but less so in sandy and poor soils. Heuchera likes semi-shade and should definitely be kept out of full sun, or the leaves will burn.
Plant the roots of Heuchera slightly deeper than the crown because they root superficially. Also avoid planting them too close to vigorous perennials.
Every 3 years you can rejuvenate the plants by digging them out, removing the long rhizome, and replanting the small plants with small roots and some rhizome. This way you maintain a more beautiful, compact plant with large leaves.
General care tips can be found here