Oxalis Censation Double Pink Wonder This attractive Oxalis, also known as Shamrock, boasts double, blush white flowers that contrast with their red picotee edges. This variety is a low growing bulb, producing a spreading clump of triangular, clover-like foliage. Although perennial, this magnificent plant is only half-hardy. In particularly mild and sheltered areas, they can be grown outdoors in rock gardens or alpine troughs, but should be protected from frost at all times. In most parts of the UK, they are best grown in containers and moved to a frost-free position in early autumn. Height and spread: 15cm (6”).