Oxalis grandis
Great yellow woodsorrel is a tall woodland Oxalis from the eastern United States, with large yellow flowers in late spring. It is a cold-hardy plant of rich, moist deciduous woods, so it needs a real winter rather than tropical conditions.
Where it grows wild
Deciduous woods, slopes and stream bottoms on sandy or alluvial soils, often in rich, moist ground under a broadleaf canopy.
Recorded between about 190 and 1,220 m, median around 300 m; the higher records come from the southern Appalachians.
🔒 Growing it like that
The wild conditions above, turned into targets for a shelf, a tent or a greenhouse. The full profile has:
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Profiles are drafts built from measured range and climate and from published sources; each section carries its own confidence in the app. Photo from Wikimedia Commons, used under its Public domain licence, unmodified.