Oxalis oregana (evergreen form)

evergreen redwood sorrel

  • © Richie Steffen / Great Plant Picks

Outstanding Qualities

If you are looking for a terrific evergreen groundcover for shade, Oxalis oregana - the evergreen form, not the deciduous form - may fit the bill. Oxalis oregana is a slow growing, rhizomatous perennial with foliage that is dark-green on its upper-side and has a purple-blush on the underside. Each leaf is divided into three heart-shaped leaflets .5 to 1 .25 inches long. It also produces tiny, sweet star-shaped flowers, in shades of pink to white from spring until fall. Try combining this oxalis with the ghost fern, Athyrium 'Ghost', or as an underplanting for shady-area shrubs like Rhododendrons, Hamamelis and Corylopsis.

Quick Facts

Plant Type: spreading perennial

Foliage Type: evergreen

Plant Height: 0 ft. 4 in. (0.09 meters)

Plant Width/Spread: 2 ft. 0 in. (0.61 meters)

Hardiness: USDA Zones 7 to 9

Flower Color: pink

Sun/Light Exposure: light to deep shade

Water Requirements: drought tolerant when established, but grows best with occasional watering

Colors & Combos

Great Color Contrasts: silver, gold, chartreuse

Great Color Partners: purple, lavender, silver

Culture Notes
Oxalis oregana is best grown in moist to well drained soil with light to deep shade. It will tolerate sandy sites and clay. Once established it is drought tolerant. Oxalis oregana, the evergreen form, is not as vigorous as the deciduous form which can become quite invasive. It does not need to be cut back in winter, but can be to create a tidier appearance.