Alyssum saxatilis now Aurinia saxatilis subsp. arduini

Ex. Hořovická pahorkatina 380 m., Czech Republic, 10-35 cm high, sunny dry place, poor rocky soil, good drainage. Lovely yellow flowers smother this compact mound of grey-green leaves, will spill down a wall or bank from mid spring until frosts. Superb in massed plantings in those drier, hard spots. Hardy and easy, Trim to maintain shape in winter. Rock garden trough, sand and gravel gardens.  Full sun. up to 60cmW 30cm H

To quote the marvellous  Robert Nord, "Aurinia saxatilis, the basket of gold alyssum... is themes drought-tolerant plant I have ever grown, including cacti. Only a stone is more drought-tolerant. It will seed freely and form attractive clumps of grey-green leaves that look nice under shrubs."

The first photo is the "look" you will achieve. Pick a dry corner to improve.