A form with variegated foliage is in cultivation. P.ovalifolia is quick growing and should be pruned back annually by about one third if a bushy shape is to be retained. Like most prostantheras it prefers a well drained, moist position with some shelter from direct summer sun. Under dry conditions it will wilt noticeably but quickly recovers when watered. Prostantheras respond to well to annual fertilising after flowering and are not as sensitive as some other Australian plants to phosphorus.
Propagation is easy from cuttings but seed can be slow to germinate.
In areas where the root-rot fungus Phytophthora cinnamomi is a problem, grafting onto the related Westringia fruticosa is recommended. You may have reached this description from one of several different sources.