Introduction Plant resources utilization of the Terra is the one ways to broaden and enrich the range of plants used for landscaping of the outdoor and indoor space. During recent years an increasing rate in outdoor landscaping during the warm season in the Botanical Garden (Institute) of ASM are used some species and its cultivars of the genus Agave L. (fam. Agavaceae Endl.). Agaves are succulent high vascular plants, stemless, with rhizomes and leaves entire, fl eshy, arranged in rosettes with thorny edges, at apex with a quite long spike, green, ashy or bluish-green, very rigid. Material and methods As the study material were used four taxa of Agave L. genus: A. americana L., A. americana L., A. marginata Hort and A. americana var. medio-paint Trel. Phenological observations of plant growth and development were performed according to the standard methodologies [Technique of phonological observations in the botanical gardens of the USSR, 1975] (2). Critical review of the collection is performed according to H. Jacobsen (1). Results and discussions During last forty years in the Botanical Garden (I) of ASM an impressive collection of Agavaceae family (Agave L.) species, which includes 35 taxa. Plants originated from the desert and subarid regions of Mexico as well as from the islands of Caribbean region, Central America and the southern parts of USA. For many years for outdoor landscape decoration for the warm seasons of the year in the Botanical Garden (I) of ASM were used A. americana and its varieties: A. a. var. medio- picra and A. a. var. marginata, as a solitary plant in the Japanese Garden, and as in composition with other species of succulent plants in rocarium. Up to present day this species and its varieties have not achieved generative phase in the greenhouse conditions of Botanical Garden, but annually mature plants form a suffi cient number of suckers, which subsequently develops young plants that can be planted outdoor in the 2nd year. Agave species and cultivars in the climatic conditions of warm period in the Republic of Moldova resists well, being exposed to sunny places. Conclusions 1. Botanical Garden (Institute) of ASM possesses a collection of the Agavaceae family plants created over about 40 years, which currently comprises 35 taxa. 2. We consider it appropriate to recommend for landscaping in open ground during the warm period in the Republic of Moldova the species A. americana and its varieties, as well as some  other species such as: A. ferdinandi-regis Bgr., A. ferox C. Koch, A. fi lifera Salm etc, which presents a vast variety of leave rosettes, leave shapes and colours. 3. The Agave collection of Botanical Garden (Institute) of ASM can be used for enhance and renewal of the range of plants used for landscaping Botanical Garden and in the Republic of Moldova.