Leadwort

Shade or partial (morning) sun. Perennial, freezing back in winter. Foliage is dark green, turning bronze in autumn. The flowers somewhat resemble the unrelated shrub plumbago, but in a striking dark-blue shade. It spreads by underground rhizomes and can clamber over and around rocks in much the same manner as trailing rosemary and Asiatic jasmine; but like Gregg Dalea and vinca, it doesn’t need supplemental water. Use it as a groundcover for difficult rocky situations and slopes. Keep it mulched. It appreciates a bit of afternoon shade in the summer.