Keep the soil in your mangrove's pot moist. Do not let it dry out.
Place the mangrove in a setting where it will receive plenty of sun or exposure to a fluorescent lamp. If using a fluorescent lamp, keep the bulb at least 4 inches away from any of the mangrove's leaves.
Mist the plant occasionally if you live in a dry region. Mangroves prefers to grow in a humid environment.
Protect your potted mangrove from cold weather. It should not be exposed to temperatures under 40 degrees.
Fertilize your mangrove on a regular basis and give it an occasional iron supplement.
Prune your mangrove on a regular basis. To keep the plant from growing too large, use scissors to cut off the unopened leaf buds at their bases. Do not trim more than two or three leaf buds from your mangrove at one time.
Check your mangrove regularly for insect problems and either kill the bugs by hand or spray the plant with a suitable pesticide.