About
Oxalis oregana, the redwood sorrel, is a creeping, rhizomatous perennial with hairy, mid-green, trifoliate leaves. Solitary, rose-pink, lilac or white flowers 2.5 cm across are produced on slender stems from spring to autumn. Reaches 20 cm tall and spreads freely � excellent for naturalising in shaded, moist, woodland conditions.
About the genus
Oxalis are annuals or perennials with fibrous, bulbous or rhizomatous rootstocks, palmately divided leaves and funnel-shaped or bowl-shaped flowers that mostly close in dull weather and at night. A diverse genus for sunny or shaded positions.
Growing conditions
SunlightFull shade, Partial shade
Soil typeChalk, Clay, Loam, Sand
Soil pHAcid, Alkaline, Neutral
Soil moistureMoist but well-drained
AspectNorth-facing, East-facing, West-facing
ExposureSheltered
UK hardinessH5
Plant details
Plant typeHerbaceous Perennial
HabitMatforming
FoliageDeciduous
Height0.1-0.5 metres
Spreadwider than 8 metres
Time to full height2-5 years
Suggested usesCottage and informal garden, Patio and container plants, Rock garden
Native toWestern N America
Care notes
CultivationGrow in moist, fertile, humus-rich soil in full or partial shade
PruningNo pruning required
PropagationPropagate by division in spring; small sections of the rhizomes root readily with bottom heat
Pest resistanceGenerally pest-free
Disease resistanceMay be susceptible to a rust