How to plant and grow Mandevilla

Mandevilla needs 6 to 8 hours of full sun for best flower production. In the hottest regions, it benefits from some shade during the afternoon.

Soil and Water
When planting outside, select a site with good drainage and rich soil. Amend the planting area with compost or other organic matter to support the blooms. Water regularly to keep the soil moist but not overly wet.
Temperature and Humidity
The preferred temperature range for mandevilla that grows outside is 68–90°F. Anything lower than 50°F is likely to damage the plant. If the plant is overwintering indoors, keep the temperature in the 60–65°F range at night and 70°F or warmer in daytime.

Fertilizer
Like most vigorous plants that bloom for long periods, mandevilla benefits from a good dose of fertilizer every once in a while.
Pruning
If the plants get a little too wild for your liking, mandevilla can be pruned or trained to keep it in bounds. Plus, this will encourage more branching and blooms.