There are more than 75 species of flowering vines in the Mandevilla genus, all native to Central and South America. Hardy to USDA zones 9 to 11, it is grown in colder regions in containers and brought indoors prior to the first frost. Mandevilla vines thrive in sunny gardens along the coast and those with a bit of afternoon shade in the hotter, inland areas.
Water the Mandevilla often enough so that the top 3 inches of soil is wet. Check the soil periodically during hot and dry weather to see if you need to water more frequently.
Spread a 3- to 4-inch layer of mulch on the soil surrounding the Mandevilla. Mulch helps the soil to remain moist and discourages the growth of weeds. Remove old mulch and provide a fresh layer of mulch each spring.
Fertilize the Mandevilla vine every two weeks in the spring and summer with a 10-20-10 fertilizer. Apply the fertilizer at the rate suggested on the label. Water after fertilizing.
Prune the tips of the Mandevilla vines while they are young to encourage more growth. This is easily done by pinching them off with your fingers.
Inspect the Mandevilla vine for pests. Common invaders include mealy bugs, which will cause yellowing of the leaves. Insecticidal soap will control this pest.