The White Mandevilla has thick woody stems and dark green foliage. It is closely related to the Red Mandevilla. Flowers usually appear in the summertime when day and night temperatures are warm. White Mandevilla's can be grown outside in USDA zones 9 to 11. These plants may become dormant if left outdoors in winter in zone 9. https://www.santhionlineplants.com/product/mandevilla-white-2/