Thelavatera (Lavatera trimestris) grows to 3 ft. with large rose-pink or white . It should be thinned to about 18 in. The tree mallow (Lavatera olbia) prefers a dry spot and light, perfectly-drained soil. It bears quantities of light pink throughout the summer and is a rapid grower, eventually reaching 6 ft. or more. It does especially well in seaside gardens, but is not usually long-lived. Increase by sown in early spring (preferably in a cold frame or ) or by taken in late summer. Established specimens dislike disturbance.