Oxalis decaphylla

Oxalis decaphylla, also known as Oxalis grayi, is a fascinating species of sorrel native to South Africa. It is one of the so-called palmate sorrel species whose leaves resemble those of tropical palm trees. It is found at altitudes of 1 700 - 3 200 m above sea level and there are different variations depending on the original location. The Latin name 'decaphylla' refers to the number of bracts, which are usually around 10, although most have slightly fewer. It is also called Tenleaf Woodsorrel.

The light green leaves have a purple stripe in the middle of each leaflet. The leaves are palmately pinnate and consist of 7-10 petals, which are 2-curved and stalked at the apex. The bracts fold down to the petiole not only at night, but also in the absence of watering. If the plant does not receive water for a long time, the leaves dry up and a dormant period follows. The small bulbs that the plant forms are covered with light brown fibrous debris.

It produces pinkish-mahogany flowers. The flowers are five-petalled, funnel-shaped and decorate the plant in late spring and summer. The inflorescence appears on stems that grow from the bulb.

Oxalis decaphylla goes dormant from autumn onwards. This means that the leaves dry out and the plant loses its above-ground part. It is important not to water the plant during this period. In spring, with the arrival of warmer weather and longer days, the Oxalis tubers will grow again. The first leaves usually appear in February. At this time you can start to water the plant again lightly.

It is easily propagated by dividing the bulbs. For nicely developed leaves with rich colour, it is important that the plants have sufficient light. In small pots, the tubers are crowded and do not have enough room to grow. This can lead to a reduction in the size and number of leaves and a reduction in flowering. I therefore recommend using a slightly larger container.