Don’t plant a clump of Oxalis unless you know its identity. The species described below are suitable, providing attractive foliage and summer, but there are other types which spread everywhere and can ruin a large part of the rockery. Oxalis is an undemanding plant, but peat or should be added before planting.
VARIETIES: O. adenophylla is the most popular species grown in the rock garden – the basic details are height 3 in., spread 6 in.
Flowering period: June-July. The greyish foliage dies down in winter – label the site to avoid damaging thewhen weeding in the spring. The flowers are bowl-shaped and shiny, white with attractive pink edging and veining. O. enneaphylla has the same growth habit, and the variety ‘Rosea’ is popular as a rockery perennial. The rose-pink flowers measure about 1 in. across and the silvery are partially folded. The only spreading species you should grow is O. chrysantha – height 2 in., spread 1 ft. This dainty carpeter bears yellow flowers.
SITE AND SOIL: Any well-drained soil – thrives best in full sun.
PROPAGATION: Divide clumps in autumn.