Indoors, we tend to have less moisture in the air and sun doesn’t penetrate the interior for as many hours as the plant needs. You can overwinter the vine and bring it out into the bright rays of light in spring and summer. Their violet allamanda houseplants can recharge and produce the amazing violet 5-inch blooms characteristic of the Allamanda.
Indoor Allamanda flowering vine needs structural support for the rambling stems. You can keep it pruned for a more compact plant. Good care of Allamanda starts with the planting medium. Use a potting soil with equal parts peat, compost, and sand. Golden trumpet houseplants need four hours or more of direct bright sunlight. The container should be at least a gallon with drainage holes. An unglazed pot is best since it will promote evaporation of excess moisture. Place the pot on a saucer filled with pebbles and water. This will create a humid atmosphere which is required for a healthy Allamanda. You can also use a humidifier. Keep the plant away from drafty doors and windows and several feet away from a heater.