The collection of the Botanical Garden is quite large and diverse. It include about 10 thousand species, forms and varieties of various plants. The greenhouse complex has a large number of tropical and subtropical plants — over 4 thousand species. The collection of cactus and other succulents has about 2 thousand species. The orchid exhibition has over 80 species.

Below are some interesting facts about the collection and the unique plant species in it (you can learn more about them later in the tour) :

- The oldest palm in the garden's collection is Livistona australis (Livistona palm). In total, the collection includes over 60 species of palm trees: Phoenix dactylifera (date palm), Metroxylon sagu (sago palm), Phoenix canariensis (Canary date palm), Howea forsteriana (Kentia Palm), Jubaea chilensis (Chilean wine palm), Chamaerops humilis (Mediterranean dwarf palm), Washingtonia filifera (desert fan palm), and others.

- Unique collection of exotic plants: Ceratonia siliqua (carob), Laurus nobilis (laurel trees), Acca sellowiana (feijoa), Eriobotrya japonica (loquat), Bambusa (bamboo), Musa basjoo (Japanese banana), Strelitzia reginae (crane flower), Brunfelsia (raintree), Ficus elastica (rubber fig), Artocarpus altilis (bread tree), Coffea arabica (Arabica coffee), Passiflora edulis (passion fruit), Carica papaya (papaya), Ficus carica (common fig), Piper nigrum (black pepper), Psidium guajava (common guava), Araucaria bidwillii (bunya pine) and others.

- Here are such unique plants as a 200-year-old specimen of the Encephalartos trispinosus (one of the oldest plants in the Botanical Garden).

- In tropical greenhouse there is a Adansonia (baobab), grown from seeds, and in the succulent greenhouse another one, donated to the Garden.

- Welwitschia mirabilis grows in the succulent greenhouse section.

- Epiphyllum oxypetalum (queen of the night) is one of the most romantic plants in the garden.

- Cycas is a genus of plants among the oldest, dating back to the time of the dinosaurs.

- Many relict and endemic plant species from different parts of the world grow outdoors. The arboretum of the Botanical Garden has 30 specimens of old Quercus robur (oak trees), aged from 60 to 100 years and more.

- Over the past 50 years, the Garden has created a collection of rhododendrons, which includes more than 170 species, varieties, hybrids and cultivars and includes evergreen, semi-evergreen and deciduous shrubs.

- In 1976, the Magnolia garden was laid. The number of trees reaches 300, and the oldest was planted in 1934 and is still blooming.

- In the spring, the Garden is flooded with Crocus (crocuses) and Tulipa (tulips), Malus (apple) and Pyrus (pear) trees (an espalier orchard has been created from them), Juniperus (junipers), Cotoneaster (cotoneasters), Spiraea (meadowsweets), Pinus heldreichii (Serbian pine), Cercis canadensis (eastern redbud), Viburnum × bodnantense (Bodnant viburnum), Chaenomeles japonica (Japanese quince), Prinsepia sinensis (Prinsep´s cherry) and Lycium barbarum (boxthorn), Kerria japonica (Japanese rose), Berberis (barberry), Lonicera (honeysuckle), Rosa (roses), Prunus serrulata (Japanese cherry), Forsythia (forsythia) and others.

- On the flowers of Juglans nigra (black walnut), one of the directors of the Botanical Garden, Sergei Navashin, made outstanding discoveries in the field of plant cytoembryology (proved the existence of double fertilization in angiosperms), which brought the Botanical Garden worldwide fame.