How to Grow Rock Jasmine
iNaturalist
Rock Jasmine
Androsace sarmentosa
flowerRock jasmine is a delicate alpine perennial featuring small, star-shaped pink or red flowers clustered in dainty umbels above rosettes of narrow green foliage. This charming ground cover thrives in rocky, well-drained environments and is prized by alpine and rock garden enthusiasts. It typically grows only 4-6 inches tall, making it ideal for containers, troughs, and alpine gardens.
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Example Rock Jasmine timeline · Pittsburgh, PA (Zone 6b)
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Plant Rock Jasmine
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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First Rock Jasmine blooms
Mid-to-late summerBefore the first fall frost (≈ Nov 8)
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-7, preferring cooler climates with excellent drainage
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Get my Rock Jasmine timeline →Growth Stages
Seed Germination
2-3 weeksTiny seedlings emerge with cotyledons visible; very delicate and small
Keep soil surface moist but not soggy. Provide cool temperatures (50-60°F). Seeds may require cold stratification (3-4 weeks moist chilling). Ensure excellent air circulation to prevent damping off.
Seedling & Rosette Formation
8-12 weeksSmall rosettes of narrow leaves develop; growth is slow and compact
Grow in bright light with excellent ventilation. Keep in gritty, very well-draining soil mix. Water carefully from below. Do not overwater.
Vegetative Growth
Several months to 1 yearEstablished rosettes expand gradually; foliage becomes denser and fuller
Maintain gritty soil conditions. Provide full sun for compact growth. Water moderately during growing season. Established plants are relatively drought-tolerant once mature.
Flowering
6-10 weeks (late spring to early summer)Delicate flower stems emerge with clusters of tiny, star-shaped pink or red flowers (some varieties nearly white)
Ensure adequate sunlight for prolific blooming. Deadhead spent flowers to encourage continued blooming. Avoid wetting flowers; water at soil level only.
Seed Development & Dormancy
4-8 weeks; dormancy variable by seasonFlowers fade and seed capsules form; foliage may become dormant in summer heat or winter cold
Allow some flowers to remain for seed set if desired. Reduce watering significantly in dormancy. Protect from excessive winter moisture and ice.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with water to dislodge; use insecticidal soap if severe. Ensure good air circulation and avoid excessive heat.
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Remove with tweezers or cotton swab dipped in rubbing alcohol. Isolate affected plants.
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Hand-pick, especially at night. Use copper tape around containers. Avoid overwatering which favors them.
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Prevent through excellent drainage and careful watering. No cure once established; remove and destroy affected plants. Repot in fresh, sterile soil.
Uses
Alpine Rock Gardens
OrnamentalRock jasmine is a classic alpine garden plant, perfect for rocky outcrops, crevices, and scree gardens where it displays its charming flower clusters. Its compact form and delicate blooms are highly valued by alpine enthusiasts. [source]
Container & Trough Gardens
OrnamentalIts dwarf habit makes it ideal for alpine troughs, clay pots, and containers where drainage can be carefully controlled. It adds delicate texture and color to miniature garden displays. [source]
Pollinator Attraction
WildlifeThe small flowers attract early-season bees and butterflies, providing an important nectar source in spring when few alpine flowers are blooming. [source]
Crevice & Wall Gardens
OrnamentalRock jasmine naturally colonizes rocky crevices and can be grown between paving stones or in dry stone walls, creating charming accents in rock features. [source]
Drought-Tolerant Groundcover
OrnamentalOnce established, rock jasmine tolerates dry conditions and requires minimal maintenance, making it suitable for xeriscape gardens and low-water landscapes in cool climates. [source]
Harvest Tips
Rock jasmine is grown for ornamental flowers, not harvested for food or material use. Deadhead faded blooms to extend flowering season. Collect seed pods after flowers fade and dry completely; store seed in cool, dry conditions for spring sowing.
Fun Facts
- 🌱 Rock jasmine is sometimes called 'Himalayan jasmine' or 'creeping androsace' and despite its name, is not a true jasmine—the common name refers to its delicate, jasmine-like flowers
- 🌱 The species naturally occurs in the Himalayas and grows in rocky alpine meadows at high elevations where it has adapted to extreme drainage and cool temperatures
- 🌱 Androsace sarmentosa produces creeping runners or stolons that root and spread horizontally, allowing it to form dense mats in ideal growing conditions
Gardening Terms
New to gardening? Learn about terms used in this guide:
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