Asarina procumbens is a low, trailing perennial native to rocky limestone outcrops in the Pyrenees of France and Spain. It produces soft, sticky-hairy stems that press close to the ground and pale yellow snapdragon-like flowers with purple-veined throats from spring through summer. In zones 7–9 it overwinters as a perennial; in colder regions it is grown as a half-hardy annual.
The plant spreads by rooting where stems contact soil and is well suited to dry stone walls, rocky banks, troughs, and the edges of raised beds. It performs best in well-drained, alkaline to neutral soil with moderate moisture and good air circulation. A pH of 7.0–7.5 suits it; amend heavy clay with grit before planting. Rich, wet soils promote stem and crown rot and reduce flowering. In zones 7–8, a light layer of grit mulch around the crown improves winter survival.