a pretty pink-flowered garden plant, happiest in neutral to acid soil.
Neither this nor the two pink-flowered bulbous “shamrocks” often bought as summer ornamentals, ‘Iron Cross’ (top), which has red leaf markings, and deep purple-leaved is invasive.
The shamrock/oxalis most universally loathed by gardeners is infamous for its fragile winter-dormant bulbs that crumble if disturbed in late summer/autumn, the soil-coloured bulbils spreading far and wide.
Removal is only possible, using finger and thumb and a kitchen fork, before midsummer when the bulbs are green. There is an equally irritating creeping yellow oxalis ( and another yellow-flowered one with reddish leaves, Both have explosive seed heads. They could all be loosely described as “shamrock”.