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How to Grow Woolly Androsace

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Woolly Androsace

Androsace lanuginosa

flower

Androsace lanuginosa is a delicate alpine perennial known for its distinctive woolly, gray-green foliage and charming pale pink or white flowers. This creeping groundcover forms tight mats and produces umbels of small, round flowers that attract pollinators. It is a prized choice for rock gardens, alpine troughs, and containers.

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Example Woolly Androsace timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Woolly Androsace

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. First Woolly Androsace blooms

    Around Aug 15

    ≈ 120 days after planting

Sample dates for Pittsburgh, PA. Sign up to get exact Woolly Androsace dates for your own zip code.

Growing Conditions

☀️
Sun: Full sun, 6+ hours daily
💧
Water: Low to moderate water needs; water when soil dries between waterings. Avoid overwatering, especially in winter. Excellent drainage is critical to prevent root rot.
📏
Spacing: 8-12 inches
📅
Days to maturity: 120-180 days
🌱
Planting depth: Surface sow; press lightly into soil but do not cover seeds completely

Soil

Type: Very well-draining, gritty alpine soil
pH: 6.0-7.0
Amendments:
Coarse sand Gravel or pea gravel Perlite Compost in moderation

Growing Zones

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Thrives in zones 3-7; tolerates zone 8 in cooler microclimates

3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a

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Growth Stages

1

Germination & Seedling

2-4 weeks

Tiny seedlings emerge with fine cotyledons. Foliage begins to show woolly texture.

Keep soil lightly moist but not waterlogged. Provide bright light. Avoid damping off with good air circulation.

2

Rosette Formation

4-8 weeks

Plant develops characteristic dense, hairy gray-green rosettes and begins spreading laterally.

Ensure excellent drainage. Begin hardening off if grown indoors. Reduce watering frequency.

3

Establishment

8-16 weeks

Mat-forming growth expands; plant becomes more robust and develops stronger root system.

Maintain dry-to-moderate soil moisture. Provide full sun. Avoid fertilizer; poor soil is preferred.

4

Flowering

4-6 weeks

Pink or white flower clusters (umbels) emerge above the mat on short stems in late spring to early summer.

Do not overwater during flowering. Remove spent flowers if desired to encourage repeat blooms. Maintain good air circulation.

5

Seed Set & Dormancy

2-4 weeks, then dormancy

Flowers fade and seeds develop. Plant may slow growth in heat or enter dormancy.

Allow seeds to mature if desired. Reduce watering in hot months. Mulch lightly with grit in winter to prevent rot.

Companion Planting

Plan your garden →

Plant with:

Sempervivum Saxifraga Phlox subulata Thymus Armeria Dianthus alpinus Sedum

Avoid planting near:

Tall perennials that shade Moisture-loving plants Plants requiring heavy fertilization

Common Pests

  • Spray with water or insecticidal soap; encourage beneficial insects

  • Improve drainage, reduce watering, remove affected plants. Apply copper fungicide if severe

  • and

    Remove by hand; use slug bait sparingly or beer traps

  • Ensure air circulation; apply sulfur dust if necessary

Uses

🏠

Rock Garden & Container Gardening

Household

Androsace lanuginosa is a classic alpine plant for rock gardens, alpine troughs, and shallow containers. Its compact mat-forming habit and delicate flowers make it a showstopper in carefully curated alpine displays. [source]

🦋

Pollinator Attraction

Wildlife

The small pink and white flowers attract bees and other pollinators, supporting local insect populations. It provides early-season nectar when few alpine plants are blooming. [source]

🎨

Ornamental Foliage Display

Craft

The soft, silver-gray woolly foliage is decorative year-round and provides textural contrast in garden compositions. The fine leaves and mats remain attractive even after flowering. [source]

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Low-Maintenance Ground Cover

Household

Once established, Androsace lanuginosa requires minimal care and thrives in poor soils where other plants struggle. It is ideal for gardeners seeking a low-intervention alpine planting. [source]

Harvest Tips

Androsace lanuginosa is not harvested for food. Cut flowers can be used in small arrangements when blooming. Collect seeds in late summer after flowers dry; store in cool, dry conditions for spring sowing.

Fun Facts

  • 🌱 Androsace lanuginosa is named for the fine, wool-like (lanuginosa) hairs covering its stems and leaves, which help protect it from intense alpine UV light and reduce water loss.
  • 🌱 The genus Androsace contains over 150 species, mostly alpine or subalpine, and is native to temperate and arctic regions of the Northern Hemisphere; A. lanuginosa hails from the Himalayas.
  • 🌱 This plant is prized by alpine specialists and has won the Royal Horticultural Society Award of Garden Merit, making it a benchmark for alpine gardening excellence.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Damping Off Full Sun Hardening Off Mulch Perennial
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