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Herbaceous Perennial

Oxalis oregana

redwood sorrel

A creeping, rhizomatous perennial with hairy, mid-green, trifoliateleaves. Solitary rose-pink, lilac or white flowers 2.5cm across are produced on slender stems from spring to autumn. Reaches 20cm in height and will spread indefinitely, naturalising in shady, woodland conditions

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Size
Ultimate height
0.1–0.5 metres
Time to ultimate height
2–5 years
Ultimate spread
Wider than 8 metres
Growing conditions
Chalk
Clay
Loam
Sand
Moisture
Moist but well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Purple Pink White Green
Summer Purple Pink White Green
Autumn Purple Pink White Green
Winter
Position
  • Full shade
  • Partial shade
Aspect

North–facing or East–facing or West–facing

Exposure
Sheltered
Hardiness
H5
Botanical details
Family
Oxalidaceae
Native to GB / Ireland
No
Foliage
Deciduous
Habit
Matforming
Genus

Oxalis can be 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

Name status

Correct

Plant range
Western N America

How to grow

Cultivation

Grow in moist, fertile, humus-rich soil in full or partial shade

Propagation

Propagate by division in spring; small sections of the rhizomes root readily with bottom heat

Suggested planting locations and garden types
  • Cottage and informal garden
  • Patio and container plants
  • Rock garden
  • Ground cover
Pruning

No pruning required

Pests

Generally pest-free

Diseases

May be susceptible to a rust

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