Rubber PlantRubber Plant Ficus Decora is noted for its thick, leathery dark green leaves that add an exotic look wherever you place them. Youll find them to be very forgiving houseguests. They work hard cleaning the air, and have a high transpiration rate, increasing a rooms humidity levels. Care Guide: Light: Does best in bright light, but can tolerate lower levels. Watering Frequency: Allow the top 2 3 inches of soil to dry out between watering's. Soil: No