ANDROSACE (Rock jasmine) Primulaceae A. species
HABITAT: Native Asia, Europe, and North America. Zones dependent on species.
USES: Rock gardens.
HABIT: Small 3-8" tufted perennial with leaves formed in clusters or rosettes at ends of stolons (runners) which provide principal means of propagation. The red, white primrose-like flowers bloom early spring.
SPECIES: A. carnea (Pine rock jasmine) 4". Zone 5. White-pink. Neutral to acid soil. Europe.
A. chamaejasme (Rock jasmine) 3". Zone 5. White-pink. Moist soil. Hairy green leaves. Europe, Asia, North America.
A. foliosa. 5". Zone 6. Light green foliage. Pink with dark pink centers. May. Himalayas.
A. lanuginosa. Prostrate. Zone 6. White leaves. Red flowers. June-July. Sun.
A. sarmentosa. 6-8". Zone 3. Green leaves. Rose. May. Moist soil. Himalaya.
A. sempervivoides. 2-4". Zone 5. 1" shiny green leaves. Pink. Tolerates light shade. May. Himalaya.
A. villosa. 3". Zone 4. White foliage. White to rose. Difficult to grow. Alkaline soil. May. Europe, Asia.
SEED GERMINATION: Sow seeds outdoors in late summer in protected area such as cold frame or for best results, sow indoors in peat pots or pellets. Keep moist at all times and at soil temperature of 50-60° until germination takes place which is usually within 10-14 days. Shift to garden when roots are well established and emerge from pot or pellet walls. Seed is often slow or difficult in which case place seed in refrigerator 8 weeks or freeze 2 weeks then germinate as above at 50-60° soil temperature.
CULTURE: Set out in sandy, loose soil with excellent drainage and enriched with humus (leaf mold, peat moss, compost, etc.) and in light shade for most types. Keep well watered, cultivated, and fertilized monthly with balanced fertilizer such as 8-8-8.
INSECTS: Not generally a problem.
DISEASES: Not generally a problem.
PROPAGATION: Division, cuttings, seed.
REMARKS: For those interested in the restrained miniature as opposed to the spectacular, rock jasmine is an excellent choice.