Very attractive ever-blooming allamanda has large, fragrant white trumpet-like flowers. This color is unusual for allamandas. Leaves are slightly smaller than othe allamanda varieties. Allamanda is perennial in tropical climates and may be treated as an annual or brought inside during cold weather and replanted after danger of frost. In areas where there is seasonal change, keep fairly dry during winter and prune in spring before growth begins. It may be desirable to prune annually in any case to control for size.