Greenhouses are structures equipped with clear plastic or glass roofs used to increase heat and humidity within the structure. Greenhouses are commonly used to grow plants that otherwise would not be able to grow outside in the cold. Many different types of plants are grown in greenhouses, often for commercial purposes. When hydrating plants in the greenhouse, use room-temperature water to avoid shocking the plants.
A member of the arum family, giant taro (Alocasia macrorrhiza) is a popular tropical greenhouse plant native to India, Sri Lanka and Malaysia. Giant taro boasts large, elephant-shaped leaves, which are a rich green. Giant taro can reach up to 15 feet high. Giant taro is well suited to the humid atmosphere of a greenhouse, and will thrive in a well drained, humus-rich soil. Moisture is essential to the health of this plant, so always water if the soil is dry to the touch. Giant taro does best in partial to nearly complete shade.
Venus Fly Trap
Ideal for a cool greenhouse, the Venus fly trap (Dionaea muscipula) is an exotic-looking carnivorous plant that lures and catches insect prey with its unique hair triggered trapping mechanism. The plant is quite small, only growing to be about 6 inches high. A native of North and South Carolina, the Venus fly trap thrives in bright light and humid, moist environments. The plant should be cultivated in a peat-based soil that's mixed with sand or something else that will promote good drainage. Never let the soil dry out between waterings. Use rainwater if possible.
Mockorange (Pittosporum tobira) is an evergreen tree native to China and Japan that grows to be about 15 feet tall. The plant boasts oval glossy green leaves and clusters of waxy white flowers. Well-suited to containers, the tree is commonly used in greenhouses because of its flowers, which have a sweet orange fragrance. Mockorange will thrive in full sun or partial shade in the greenhouse, growing in just about any soil type so long as its not water logged. Though moderately drought-tolerant, the plant should receive an average amount of water: let soil just barely dry out before watering again.