Species library · Plants & herbs

Foraging Soursob

Oxalis corniculata

Typically in season from September to May in the northern hemisphere. Found in Disturbed ground, Grassland. Has toxic lookalikes, so check carefully.

Soursob (Oxalis corniculata)

Photo: (c) jacinta lluch valero, some rights reserved (CC BY-SA) · iNaturalist

When Soursob is in season

Typical window in the northern hemisphere, peak September to May. The southern hemisphere runs about six months offset, and your own timing depends on local weather, so check your town.

→ Everything in season to forage in September

Where it grows

Soursob is usually found in Disturbed ground, Grassland.

⚠ Look-alikes & safety

Similar species: Common yellow woodsorrel, Slender yellow woodsorrel, Black medick. Only forage with a confident ID.

Take Soursob into the field

Open Soursob in the Forage app for its full field guide entry with more photos, key features and toxic lookalikes to check against. Add it to your watchlist and the app pings you the moment it comes into season at your exact spot, worked out from live weather, elevation and billions of occurrence records.

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Soursob: common questions

When is Soursob in season?

Soursob is generally in season from September to May in temperate northern regions. The exact timing shifts with latitude, elevation and each year's weather. Check the Season Finder for your own location.

Where does Soursob grow?

Soursob is usually found in Disturbed ground, Grassland.

Is Soursob safe to forage?

Similar species: Common yellow woodsorrel, Slender yellow woodsorrel, Black medick. Only forage with a confident ID. Never eat any wild plant, berry, nut or mushroom unless you are completely certain of the identification. Check every find against a reliable field guide, and when in doubt, don't.

One note before you head out

Forage helps you discover and identify wild plants, but identification is never 100% certain. Many edible plants have toxic lookalikes. Never eat anything you find based only on what this app tells you. Always confirm with a field guide, an experienced forager or a local expert. The season score tells you where to look, too: it’s not a guarantee. Mind conservation law and property rights as well.

Species photos via Wikimedia Commons and iNaturalist · full credits