Every year I grow two hanging baskets of Dipladenia. At the end of the season they die and I throw them out. Could I plant them in the ground in Toronto? Would they survive? If I brought them in and stored them in the basement…would they comeback?
Dipladenia, Mandevilla boliviensis , is a tropical and subtropical evergreen flowering vine and is winter hardy to USDA Zones 10-11. In colder climates, such as ours, the plant is usually grown in large containers that can be brought inside and overwintered indoors. If your plants are in hanging baskets, you can bring them indoors before frost and overwinter them in a warm, sunny room, probably not the basement. Prune the plant stems back before placing them outside again in the spring, once the last frost date has passed. This plant does best in moist, well-drained potting soil in part shade to full sun.