PAPER The possibilities of naturalization of rare and vanishing plants’ species are surveyed in master’s study The subject of research - The botanical gardens of Liskiava with the rare and vanishing plants’ species cultured and naturalized there. Objective of the research – Naturalized species of the plants: Turk’s-cap (Lilium martagon), medicinal angelica (Angelica archangelica), perennial satinflower (Lunaria rediviva), and ivy bedstraw (Hedera helix). Also the naturalization in site of rare plants is observed and estimated. Methods of study – Some studied plants were brought from their natural vegetation places, digging out it with the thickness of soil, some of then were sown from seeds: macro bloom finger-flower (Digitalis grandiflora), meadowy salvia (Salvia pratensis). The naturalization of these plants and capability to proliferate is also observed. Ecologist of Dzukija National park, Henrikas Gudavicius conduced to pursue the observation and researches, also rendered comprehensive information about the botanical gardens of Liskiava. Such possibilities of naturalization of rare and vanishing plants’ species were no studied in Lithuania. The conclusion could be done under the results of research: rare plants can be naturalized, just the proper place must be chosen and the observation is necessary during the first year. Keywords: National park of Dzukija, The botanical gardens of Liskiava, rare and vanishing plants’ species, naturalization.