Oxalis is a shade tolerant group of plants in the sorrel family. You get a mixture of three varieties with this order; Oxalis deppei (Four-Leaved Oxalis) Oxalis adenophylla (Silver Shamrock) Oxalis triangularis (Purple Oxalis) Supplied as established plants in 9 cm diameter pots. Just dig a hole big enough for the root-ball, put it in then back-fill with soil, firm down and water well.