Growli

Plant care

Violet Wood Sorrel (Violet Woodsorrel) care

Oxalis violacea

Also called Violet Wood Sorrel, Violet Woodsorrel.

RHS H5USDA 5-9Toxic to petsIndoor 10–20 cm (4–8 in) tall in flower

Watering rhythm

Bright indirect light (just back from a sunny window)

Moderate during active growth (spring); very little during summer dormancy

Light

Bright indirect light (just back from a sunny window)

Soil

Well-drained, average to slightly dry, sandy or loamy

Humidity

Low to moderate

Temp

-20°C to 35°C

Pet safety

Toxic to pets

Mature size

10–20 cm (4–8 in) tall in flower

Care at a glance

Light

Bright but filtered. Violet Wood Sorrel burns within days in unfiltered south-facing summer sun, and stops growing within months in deep shade. Thrives in full sun to partial shade; in warmer parts of its range (zones 7–9) afternoon shade helps extend the spring flowering season and reduces premature dormancy. If you only have a south window, set the plant back 1.5 m or hang a sheer curtain — both knock the intensity down into the right range.

Watering

Watering violet wood sorrel: moderate during active growth (spring); very little during summer dormancy. The number that matters isn't the day of the week — it's how dry the top 2-3 cm of the pot feels. A finger in the soil tells you more than a watering app. After every watering, tip the saucer. Keep soil evenly moist during the spring growing season; sharply reduce watering once foliage yellows and the plant enters summer dormancy to prevent bulb rot.

Soil and pot

Violet Wood Sorrel grows best in well-drained, average to slightly dry, sandy or loamy. Prefers average to dry, well-drained soil; grows in sandy loam, rocky soil, and clay loam. Good drainage is critical during summer dormancy to prevent the bulbs from rotting. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.

Humidity and temperature

Violet Wood Sorrel sits happiest at around Low to moderate humidity and -20°C to 35°C (-4°F to 95°F). Tolerates average outdoor humidity; high humidity combined with poor drainage significantly increases the risk of bulb and crown rot. If you keep the room above year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.

Fertilising

Feed violet wood sorrel sparingly. Apply a balanced, low-nitrogen fertiliser lightly in early spring as growth emerges; excessive feeding encourages foliage over flowers. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.

Common problems

Below are the issues we see most often on violet wood sorrel in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Bulb rot during summer dormancyThe most common failure; caused by waterlogged soil when the plant is dormant. Ensure very sharp drainage or lift and store bulbs dry in warm climates with wet summers.
  • Invasive spreading via bulb offsetsPlants spread freely underground and can become difficult to eradicate once established in a bed; site carefully or use containers to limit spread.
  • Slugs and snailsEmerging spring foliage is susceptible to slug damage; use iron phosphate pellets or copper barriers around plantings early in the season.

Propagation

Division of bulb offsets in late summer or autumn, replanted 5–7 cm (2–3 in) deep; seed can be sown in autumn, though germination is slow and irregular. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.

Toxicity to pets

Violet Wood Sorrel is toxic to pets. ASPCA lists Oxalis (Shamrock Plant, Oxalis spp.) as toxic to cats, dogs, and horses. The toxic principle is soluble calcium oxalates. Ingestion can cause salivation, vomiting, diarrhoea, and in large quantities kidney failure (rare in dogs and cats) and tremors. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).

Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.

Violet Wood Sorrel care — frequently asked questions

What is the common name for Oxalis violacea?

Oxalis violacea is most commonly called Violet Wood Sorrel, but it is also known as Violet Wood Sorrel, Violet Woodsorrel. The names refer to the same species, so care instructions for Violet Wood Sorrel apply identically to anything sold as Violet Woodsorrel.

How much light does violet wood sorrel need?

Violet Wood Sorrel grows best in bright indirect light (just back from a sunny window). Thrives in full sun to partial shade; in warmer parts of its range (zones 7–9) afternoon shade helps extend the spring flowering season and reduces premature dormancy.

How often should I water violet wood sorrel?

Water violet wood sorrel moderate during active growth (spring); very little during summer dormancy. Keep soil evenly moist during the spring growing season; sharply reduce watering once foliage yellows and the plant enters summer dormancy to prevent bulb rot. The finger-test (or lifting the pot to feel its weight) beats a fixed weekly calendar because pot size, light, and season all change how fast the soil dries.

Is violet wood sorrel toxic to cats and dogs?

Violet Wood Sorrel is toxic to pets. ASPCA lists Oxalis (Shamrock Plant, Oxalis spp.) as toxic to cats, dogs, and horses. The toxic principle is soluble calcium oxalates. Ingestion can cause salivation, vomiting, diarrhoea, and in large quantities kidney failure (rare in dogs and cats) and tremors.

What USDA hardiness zone does violet wood sorrel grow in?

Violet Wood Sorrel is rated for USDA zone 5-9 and RHS hardiness H5. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Violet Wood Sorrel deep-dive guides

Every aspect of violet wood sorrel care, each with its own calibrated guide:

Featured in these plant shortlists

Violet Wood Sorrel qualifies for 3 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

Related guides

Violet Wood Sorrel is also commonly called Violet Wood Sorrel or Violet Woodsorrel.