Androsace sarmentosa aka Himalayan Rock Jasmine

Androsace sarmentosa, known as rock jasmine, is a small perennial in the primrose family, Primulaceae. Its native range runs from the Himalaya to southern Tibet. It grows in a temperate climate. Wild habitats include mixed forests and grassy slopes high in the mountains. These sites lie about 9,200–13,100 feet [2,800–4,000 metres] above sea level.

The plant reaches about 0.33 feet [0.1 metres] tall. Its spread is about 0.66 feet [0.2 metres]. This low form suits ground cover and small planting spaces. It also grows well on dry stone walls. Gardeners can use it in beds or wall crevices. Plants For A Future lists east-, south-, and west-facing walls as suitable sites. The plant forms runners, which offer a way to raise new plants. Flowers appear from July to August. Each flower has both male and female organs.

Good drainage is a key part of its care. It needs light or sandy soil with few nutrients. Plants For A Future also lists loam as suitable. The soil should be alkaline, and the plant can cope with strongly alkaline conditions. Limestone chips can help provide the soil conditions it needs. Full sun suits it in most sites. In places with hot summers, some shade can be better. Shelter from the hottest sun is useful there. The source also reports tolerance of hot, humid summers. Soil may be dry or moist, but it must drain well.

Seed needs a cold period before it can sprout. Sow ripe seed in a cold frame when possible. Water seed pots from below. Germination can take up to two years, so seed raising takes patience. Move seedlings into separate pots once they are large enough. Keep them in a partly shaded cold frame while they grow. Plant them out in late spring or early summer. Another method is to divide runners in early summer. Grow these in sandy compost until they have strong roots.

Plants For A Future records no known edible uses or hazards. This does not establish that the plant is safe to eat. The same source describes use of the whole plant in Tibetan medicine. These traditional uses concern inflammation and disorders involving body fluids. They are records of use, not proof that treatment works. Its clear garden role is as a low ground cover.