Description

Androsace – Douglasia – Rock jasmine

There are about 100 species of annuals, biennials, mostly evergreen mat or cushion forming perennials, in this genus.  They occur in the mountains of the Northern Hemisphere.   The small rosettes produce hairy leaves and produce stemless or short stemmed tubular based small white or pink, 5 petalled flowers in spring in summer with flat or cup shape lobes held singly or in umbels.  Favorite for rock gardens.

If grown indoors plant in pans in full light with good ventilation very sharply drained mix of equal parts of soil based potting mix and grit with a collar of grit around the neck of the plant.  Best watered from below.

If grown outdoors, plant in moist but gritty well-drained soil in a trough in full sun.  In hot areas with hot summer provide shade from afternoon sun.

Prone to downy mildew, leaf spot, rust and aphids.

Androsace vandelli – Androsace imbricata – This native to Sierra Nevada, Pyrenees, and the Alps, grows 1 ½-2” tall and spreads to 3-5” wide.  This evergreen cushion forming produces dense rosettes ¼” –1/2” wide of linear to elliptic silvery gray- hairy leaves to ¼” long.  In early and mid spring it bears white flowers with a yellow center 1/8-3/8” across are held singly from the leaf axils on stems up to ¼” long.

Zones 5-7