I planted quite a few Heuchera last year, in association with Pulmonarias around the feet of some dogwoods. The heucheras look pretty poor at the moment (late March) but are alive.
Having not had much to do with these plants in the past I am wondering if it is normal for them to die almost back in winter and re-clothe in Spring? most of mine are variants on Palace Purple, with a few Lime Marmalade. The green ones are looking much healthier than the purple. They are in sunny/dappled shade and moist soil.