Below plants are hardy down to USDA Hardiness Zone 3, prefer dry to medium moist soils, and full sun to part shade:
Below plants are hardy down to USDA Hardiness Zone 3 and 4 (respectively), prefer medium moist soils, and part shade:
Today (2011-09-16), I was made aware of this groundcover plant (hardy down to USDA Hardiness Zone 5, prefers medium moist soils, and full sun to part shade):
Additionally you may wish to take a look at the following question here on SE:
This time of new, later Summer, early Autumn (Fall) is normally an excellent time of pick up some real plant bargains at garden centers, nurseries, big box stores, etc and it's also a perfect time of year to get those plants in the ground and established before Wintertime arrives...
Also, most groundcover plants by their very nature spread, fill-in... therefore make excellent candidates for division (taking small sections and establishing them elsewhere). With that in mind, do you have neighbours, gardening friends, etc that have such plants and would be happy to let you take a few small plugs for establishment in your garden?