Dig the planting hole twice as wide and to the same depth as the root-ball. Remove the plant from the container, gently tease the roots.
Position in hole and backfill with soil, gently firming down. Form a raised or doughnut shaped ring of soil around the outer edge of the plant's root zone. This helps keep water where it's needed. Always water in well after planting to settle the soil around the roots and keep the soil moist for several weeks while the new plant establishes.
Mulch around the base with organic mulch like bark chips, sugarcane or pea straw, keeping it away from the base of the plant.
Mandevillas don’t like getting wet feet so avoid overwatering.
Ensure that you provide the plant with plenty of sturdy support to grow on.
Some mandevillas are often also referred to as diplandenias. These plants are considered to be forms of M. sanderii.
For the cooler climates try growing M. laxa. This deciduous variety produces fragrant summer flowers and can tolerate frosts down to -6°C. If it is damaged by the cold, cut back completely and it will re-shoot from the base.
Wear gloves when pruning to protect your skin from the milky sap.