Groundcover for very sunny slope
We have about a 600 sqft slope that faces directly South at an angle of about 30 degrees. We tried in vain to get grass to grow here, but the sun just burns it to death. The soil in that area is lousy - low pH and stony. I could amend the soil, but I'd rather save my compost for the vegetable garden and use some type of ground cover here that doesn't mind extreme sun and poor soil.
So I guess the requirements are:
1) Can withstand intense sun.
3) Spreads relatively quickly
4) Tolerates poor soil.
Does anyone have any suggestions?