Posted: 16/06/2015 at 19:21
Not particularly fast growing but Heuchera are pretty tough, need no real maintenance and come in an incredible number of colours these days. Evergreen too. If you grow them fairly close together they will suppress any weed growth.
The problem with most fast-growing ground cover is that it rarely stays where you want it and often becomes a thug if you don't keep it in check (which is, of course, the maintenance you are trying to avoid!)