The extensive tree species collection involves more than 500 coniferous and deciduous tree species as well as more than their 1,000 different forms or cultivated varieties and 1,500 of geographical origins, in the total amount of nearly 14,000 items. The material planted in the area of the ABH is very precious. In most cases there are originals gained directly from natural forests of Slovakia, or they were obtained from different specialised institutions. The exact register and photo documentation are maintained, therefore the preconditions for the next monitoring and evaluating are created. The most valuable purpose of the ABH resides in the fact that individual populations and precious forms of indigenous tree species from different parts of Slovakia are generatively and vegetatively reproduced and subsequently preserved as a valuable gene pool.
Moreover, the Arboretum contains the largest collection of roses in the Slovak Republic. This collection includes more than 800 varieties of bed, park, climbing and miniature roses, in the total number of nearly 3,500 specimens. The varieties of roses bred in Slovakia and the Czech Republic are concentrated and recorded in the ABH, as well as the quality and resistant varieties from the cultivators from other countries. In one part of the greenhouse, there are more than 650 species of cacti and succulents. The majority have been registered in the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES).