More than 2000 species of plants are preserved at Bali Botanic Garden, represent plants from montane areas of the eastern Indonesia: Bali, Nusa Tenggara, Sulawesi, Maluku and Papua. New plants are acquired from commercial nurseries, arboreta, botanic gardens, plant breeding programs and collecting expeditions. Because of its unique site incorporating landscape gardens, native habitat areas, the Garden is able to curate terrestrial and aquatic plants found in similar habitats. Seeds and plants are accepted only if their provenance is known and documented and only if they have been collected and imported legally. Plants that have the potential for invasiveness, genetic pollution or introducing pests or diseases are carefully screened or evaluated before acceptance.
The collections are devided into beds which are subdevided into section. Each bed is given a roman numeral (eg. IV) and each section is given a letter (eg. A); these are written on a green concrete corner-stone (eg. IV.A.). Each plant whithin the section is given a unique number to identify it. Most collections in the garden have green metal label and a small aluminium tag which give it a unique identification number (eg. IV.B.15) corresponding with information held in the Garden’s Database. Most of the beds in the garden are orginized according to plant family, reflecting the evolutionary relationships between plants. This mean that plants which are closely related are planted togather.
In addition to the general collections, specialized collections offer depth and breadth within 8 selected themes or families. These specialized collections include: Ferns, Orchids, Cactus, Begonia, Medicinal plants, Ceremonial plants, Roses and Aquatic plants. Specialty collections are important nationally because of their scope.