groundcover for poor, clay shade area
Hello from Sioux City, Iowa! I'm looking for a fast spreading perenial ground cover for an area that is mostly shade, dry, poor clay/rocky soil, under a large tree and deck. Grass has never grown here as far as I know - been living here 10 years. I've tried wild flowers, etc - nothing seems to take hold. I have some day lillies along one fence, but otherwise, I've had no luck getting anything to grow. I like natural gardens, especially plants that attract hummingbirds and butterflies. Area is fairly large; want something with minimum maintenance. Can be low or medium high; I have a cat and dog that are outside, so nothing that would harm them. Any help is appreciated!