Water thoroughly when the top 2-3 cm of soil feels dry to the touch. Mandevilla sanderi prefers consistent moisture but dislikes waterlogged conditions. Reduce watering in cooler months when growth slows.

Ensure good drainage to prevent root rot, especially when grown in containers.

Prune in late winter or early spring before new growth begins. Remove dead, damaged, or overgrown stems to maintain shape and encourage bushier growth.

Lightly trim to control size and direct energy towards flower production. Heavy pruning can be done to rejuvenate old plants.

Propagate by stem cuttings taken in spring or summer. Use cuttings about 10-15 cm long, with the lower leaves removed. Dip the cut end in rooting hormone and plant in moist, well-draining potting mix.

Keep in a warm, humid location with bright, indirect light until roots form.

Repot every 2-3 years or when the plant becomes root-bound. Choose a pot that is only slightly larger than the current one. Use a well-draining potting mix, ideally with added perlite or sand.

Repot in spring, just as new growth begins, to minimize transplant shock.