Oxalis corniculata

Creeping Woodsorrel Identification & Control

Creeping Woodsorrel is an exceptionally aggressive, low-growing perennial broadleaf weed in the oxalis family. Native to southern Asia, it has successfully invaded home lawns, greenhouse beds, and ornamental borders globally. Unlike upright woodsorrel, it spreads aggressively via prostrate, creeping horizontal runners (stolons) that root at every node, forming dense purple-green mats. Sprouting three-part heart-shaped leaves and small yellow flowers, it is extremely difficult to eradicate once it anchors into turf grass.

Sunlight Full Sun to Shade

Watering Tolerance Moderate

Soil Adaptability Any Soil / Rich / Clay / Moist

Growth Temp 8°C - 38°C

Danger / Toxicity Pet Toxic / Creeping Runners

Botanical macro photography of Creeping Woodsorrel (Oxalis corniculata) - Plant AI care and control database

How to Identify Creeping Woodsorrel

A prostrate, creeping perennial weed forming dense purple-green mats, with heart-shaped leaflets, rooting stolon stems, and yellow flowers.

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Purple-Green Stolon Runners: Stems creep horizontally flat along the soil, frequently colored a deep reddish-purple, rooting firmly at every leaf node.
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Heart-Shaped Purple-Green Leaves: The three heart-shaped leaflets are often tinged with a beautiful, deep bronze-purple to reddish-brown color.
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Small Yellow Flowers: Dainty, small, bright yellow, 5-petaled flowers blooming individually or in pairs from upper leaf joints.

💡 Plant AI Tip: Creeping Woodsorrel is the greenhouse owner's nightmare! Because it roots at every node and flings seeds explosively, it can rapidly colonize pot margins, gravel trays, and under-bench seams.

Complete Care & Management Guide

Access highly technical, scientific management directives to control or cultivate Creeping Woodsorrel effectively.

Requires consistent moisture but is highly drought-tolerant due to its woody stolons. It thrives in damp greenhouse gravel and overwatered lawns. Allowing the top soil layer to dry out helps slow its spread.

Extremely resistant to mowing. Horizontal stems creep flat along the soil beneath mower height. Mowing actually removes competing turf grass, allowing Creeping Woodsorrel to expand.

Highly aggressive. It absorbs high levels of nitrogen and potassium, outcompeting pasture grasses and garden flowers. Shifting soil fertility helps grass compete.

Highly versatile. Thrives in Full Sun but exhibits high shade tolerance, allowing it to colonize dense forest understories and dark house alleyways.

Adapts to clay, rich loam, sandy loam, and gravelly forest edges, provided the substrate is well-drained. It struggles in swampy soils.

Spreads via seeds and rooting stolons. The seed pods explode when dry, flinging seeds up to 10 feet horizontally. A single plant can produce thousands of seeds.

Extremely cold-hardy perennial. Leaves die back under freezing winter temperatures, but the woody taproot crown survives easily, sprouting in early spring.

Features a shallow but extremely dense, tough fibrous root network anchored to creeping stolons that root at every node touching the soil.

Occasionally targeted by aphids, but pests rarely cause significant damage to this highly robust annual grass.

Subject to **Browning Rust** and **Leaf Spots** in damp autumns, though diseases rarely kill the weed before it successfully sets seed.

To control Creeping Woodsorrel organically, manually dig up young rosettes in spring before they flower, use a hoe to scrape seedlings, and mulch garden beds heavily to block seed light.

Common Diseases & Treatment

Stolon Node Rooting

Symptoms: Symptoms: The creeping square stems root at every node, making hand-pulling break the vine, leaving roots behind.

Action: Action: Dig slowly. Moisten the soil beforehand to make extraction easier. Pull from the base of the runner, ensuring you lift all rooted nodes.

Explosive Seed podting

Symptoms: Symptoms: Stiff, pointed seed capsules burst violently upon light touch, flinging seeds up to 10 feet.

Action: Action: Place a clear plastic bag over the seeded stems before cutting to catch the flying seeds, and dispose in trash bags.

Frequently Asked Questions

How do you distinguish Creeping Woodsorrel from Yellow Woodsorrel?

Creeping Woodsorrel (Oxalis corniculata) crawls flat along the ground, has horizontal runners that root at nodes, and leaves are often a deep bronze-purple. Yellow Woodsorrel (Oxalis stricta) grows strictly upright, lacks rooting stolons, and has light-green leaves.

Are the purple-green leaves toxic to pets?

Yes. Like all Oxalis species, it is rich in soluble calcium oxalates, which can cause salivation, tremors, weakness, and potential kidney failure in dogs, cats, and rabbits if ingested.

Why does it thrive in greenhouse pots?

The warm, damp, and shaded microclimate of greenhouse pots is perfect for this weed. It roots firmly in the rich potting soil, and its explosive seed pods easily shoot seeds into neighboring pots, making containment difficult.

What is the best way to get rid of it?

Because it roots at every node, hand-pulling must be done slowly to extract the entire creeping chain. Cardboard sheet mulching for a full year is also effective in garden beds.