
Arboretum: Apart from the ornamental beds, another major attraction at the Garden is the arboretum. Here plants are grouped according to their botanical families for educational purposes. The Arboretum includes plants from various families including the following: Fig Family, Banana Family, Palm Family, Ginger Family, Pine Family.

Glasshouse Complex: The Glasshouse Complex is almost ready for the public viewing. It has been an ongoing project expected to be completed by August 2000. The complex comprises of 5 exhibition conservatories and 8 greenhouses for plant collections. The largest conservatory is the "Tropical Rainforest House" with a floor space of 1000 sq.m, and a height of 33 m. It holds the Garden's collection of native palms, cycads, ferns, and other tropical species of Southeast Asia. Apart from the tropical plants in the main Conservatory, other shaded glasshouses contain plants including orchids, cacti, and water lilies.
Orchid Nursery: Presently, there are about 500 species of wild Thai orchids in the orchid nursery. Among these, 60 species are considered rare and 20 species endangered. When appropriate, species under threat from becoming extinct are mass propagated in the tissue culture laboratory. Wild orchid collecting is done mainly in the North where more than 600 species have been estimated. Collected specimens are taxonomically identified, labeled, and well-taken care of in the nursery. Dried and preserved specimens are kept at the herbarium center for taxonomical use.

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