Woolly Rockjasmine (Androsace villosa): complete guide

Overview

Androsace villosa, known as woolly rockjasmine or woolly manssheild, is an exceptionally hardy small alpine plant with distribution from Europe through Mongolia to the Himalaya. This plant is known for its hairy grayish foliage and charming pink to purple flowers. As a native alpine plant, this results in exceptional winter hardiness.

Appearance and Bloom

Androsace villosa forms dense, extremely compact rosettes of hairy leaves that have a grayish or silvery appearance. The plant reaches only 5 to 10 centimeters in height with spread to 20 centimeters. In late spring to early summer (May-June), numerous small flowers appear in pink to purple on very fine stems.

The hair on the leaves helps the plant retain water and protects against intense UV radiation. This also gives the plant a remarkably beautiful, silvery appearance year-round.

Ideal Location

Woolly rockjasmine thrives in full sun where at least 6-8 hours of direct sunlight occurs daily. The plant is very frost hardy. Most critical is excellent drainage; the plant hates wet feet, especially in winter.

Plant in rock gardens, alpine troughs, rocky borders, or between stones. Combine with other alpine species for dramatic mountain effects.

Soil

Androsace villosa requires very well-drained soil, preferably with substantial gravel and sand. Alpine potting soil or specialist alpine mix works well. The plant tolerates poor soils well.

Watering

Watering must be done carefully. During the growing season, water moderately. In winter, reduce water dramatically, especially if grown outdoors.

Pruning

Androsace villosa requires no pruning. Remove faded flowers gently to encourage more blooming. The plant grows very compact and neat naturally.

Maintenance Calendar

Spring: Check drainage. Summer: Water regularly, enjoy flowers. Autumn: Gradually reduce watering. Winter: Reduce water dramatically.

Every two to three years, repot in fresh, well-drained medium when active growth starts.

Winter Hardiness

Androsace villosa is very winter hardy and can tolerate temperatures to -30 degrees Celsius or lower in dry conditions. However, it is primarily the wet-in-winter problem that is dangerous.

In very wet climates, cultivation in pots that can be kept dry in winter under protection is better.

Companion Plants

Androsace villosa works well with other true alpine species such as saxifrages, sedums, dianthus, and alpine phlox. Group flowers by color for attractive effects.

Closing

Androsace villosa is a beautiful small plant for those with passion for alpine gardening. With its hairy, silvery foliage and purple flowers, this is a jewel for rock gardens and alpine troughs. The robustness in cold climates makes it also excellent for mountain regions.

When seeking Androsace villosa, contact alpine plant specialists. Specialty garden retailers sometimes carry alpine selections. Gardenworld.app inspires you with rock and alpine garden designs.