The Climatron® is the first geodesic dome to be used as a conservatory, incorporating the principles of R. Buckminster Fuller, inventor of the geodesic system. More than 2,800 plants, including 1,400 different tropical species, grow inside the Climatron. They include banana, cacao, coffee, many wild-collected plants, orchids, and exotic, rare plants such as the double coconut, which produces the largest seed in the plant kingdom. The lush, green tropical rainforest environment is maintained by a computerized climate control system. Inside temperature ranges from 64°F (29° C) at night to a high of 85°F (18° C) during the day. The average humidity is 85 percent. Plants are watered with reverse osmosis purified, tempered water.

Linnean House
Linnean House
Built in 1882, the Linnean House is the oldest continuously operated public greenhouse west of the Mississippi River. It is the only remaining greenhouse at the Garden that was built during Henry Shaw’s day. The Linnean House was originally designed to be an orangery, a house to overwinter citrus trees, palms and tree ferns. The northern half of the greenhouse showcases dozens of camellia trees, while the narrower southern half of the conservatory has been restored to its original use as an orangery. Various tropical and citrus plants are housed on the paved region from mid-October to April, then moved outdoors annually in spring and summer to grace the Kresko Victorian Garden, Bakewell Ottoman Garden and other display gardens. 

Temperate House
Shoenberg Temperate House
With 8,900 square feet of space, the Shoenberg Temperate House emphasizes displays of warm temperate-zone species requiring special protection from St. Louis winters. The largest portion of the house features species from five widely separated regions of the world known for their “Mediterranean” climate, chiefly characterized by warm, dry summers and cool, moist winters: coastal California, the central coast of Chile, the Mediterranean Sea basin, the Cape region of South Africa, and southern and southwestern Australia. Another portion of the Temperate House features plants found in the southeastern United States and the warm, temperate areas of Japan, China and Korea.