Tropical Plants require a lot of water. Tropical plants are no longer exclusive to tropical areas. The main features of tropical plants are plants with large leaves and dense growth. Tropical plants require the soil to be humid at all times. Tropical gardens are the most difficult to grow and maintain. They key to healthy tropical plants is light and lots of water, but don’t over water your plants or you can kill them. Remember to bring your tropical plants indoors in the winter and move them back outdoors in the garden during summer months.