I had a corner planted with autumn crocus that never bloomed, never. That corner is now overrun with snow-on-the-mountain, and the crocus foliage is a distant memory. I have some woolly thyme on one edge of my little "rock garden" between driveways, sidewalk, and street... no weeds even try to overgrow it in that spot! It's a sweet little plant, just hard to find a good spot for it because it's SO low.