Mandevilla, a tropical vine native to South America, produces abundant pink, white or yellow trumpet-shaped blossoms in summer that contrast with the plant's attractive, dark-green foliage. The vine's fuzzy stems twine around trellises or other support structures with ease. Mandevilla vine also makes an excellent container plant and flourishes in hanging baskets. Hardy in USDA zones 9 through 11, mandevilla is not accustomed to cold temperatures and gardeners in cooler zones of the United States typically grow the plant in a container to over-winter indoors.
Plant mandevilla vine in a medium-sized container filled with a growing medium made of equal parts potting soil, coarse sand and peat moss. Keep in a location that receives bright, indirect sunlight throughout the day.
Maintain a consistent temperature of 70 degrees Fahrenheit or above during the day and 60 to 65 degrees at night. Never expose the plant to temperatures below 45 degrees Fahrenheit or cold damage will occur.
Water mandevilla vine once every five to seven days to keep the soil moist. Reduce the frequency of watering during winter to once every 10 to 14 days, or whenever the top 2 inches of soil are dry to the touch.
Feed the plant during the spring and summer months using a 10-20-10 NPK fertilizer to provide proper nutrition for growth and flowering. Apply at the rate recommended by the manufacturer for the best results. Do not fertilize during fall and winter.
Prune mandevilla vine during late winter, just before active growth resumes in spring, to keep the plant attractive and healthy. Pinch off any dead, damaged or old growth, and cut back any excessively long vines to keep the plant compact.