The purple-leaf shamrock, Oxalis triangularis, is a low-growing foliage plant for the garden that also makes for an attractive indoor plant with rich, vibrant, purple leaves.
Ideally soak the soil and then allow the top inch or so to dry out before watering again. Although irregular and random watering is not a problem, the plant can often go months without adverse effects especially when it's cooler. However if it's very warm or it sits in a very bright spot you will need to make an effort to water regularly, because if things get too dry the plant will die back. Feeding should be infrequent, so using an all purpose fertiliser at normal strength once every couple of months is plenty.