Family Agavaceae Endl. belongs to class Liliopsida and includes 10 genera and about 450 species, widespread in tropical and subtropical arid regions of North and Central America, in the northern part of South America, on the islands of the Caribbean Basin and also in the western part of Asia.  The collection of plants from Agavaceae family, created within the BG in the course of about 40 years, served as material for the research. Phenological observations on flowering and formation of fruits with seeds were carried out according to «Методика фенологических наблюдений в ботанических садах СССР-1975-Москва, «Наука», 75 стр. (Methods of phenological observations in the botanical gardens of the USSR). The seed productivity of Agave L. species was determined according to «Методические указания по семеноведению интродуцентов», 1980- Москва, «Наука» (Methodical guidelines for the study of seeds of introduced species). The evaluation of the collection was carried out according to H. Jacobsen, 1970.  The collection of plants from Agavaceae family within the BG (I) of the ASM was created in the early 70s of the 20th century. A lot of species were brought as seedlings, suckers or seeds from various Botanical Gardens of Russia, Ukraine, Romania etc. The collection of plants from Agavaceae family, of the BG (I) of the ASM, includes 52 taxa belonging to 6 genera: Agave – 40 taxa, Iucca – 6, Fourcraea – 3, Dasylirion – 1, Hesperaloe – 1 and Beschorneria – 1. Within the genus Agave, 8 (20%) species reached the generative phase, 5 (12%) of which formed fruits with viable seeds; at Agave sp., on the flower stem, after flowering, in the place where usually appear flowers, young plantlets appeared, which served to restore the species, at Iucca – two taxa bloomed, but did not form fruits with seeds; at Beschorneria – after flowering, on the flower stem also developed young plantlets. At Agave species, the inflorescence development until the opening of the first flower lasts from 30 days at A. ferdinandiregis to 90 days at A. albicans. The length of flowering stage ranges from 31 days at A. victoriaereginae to 61 days at A. ferdinandi-regis.  The seeds of Agave species are found in dry dehiscent capsule fruits, with three locules. The size of the fruits varies from 2.5 cm long and 1.3 cm wide at A. ferdinandi-regis to 1.6 cm and 0.7 cm, respectively, at A. victoriae-reginae. The potential productivity of seeds of Agave species ranges from 267 seeds in one fruit at A. ferdinandi-regis, to 22 seeds at A. schotii, the real productivity is much lower in comparison with the potential one: 44 (16,3%) at A. ferdinandi-regis, and 2 at A. schotii.  All species and varieties of plants of fam. Agavaceae from our collections propagate vegetatively (by suckers) while the plants that form seeds propagate by seeds too, but the plantlets obtained from seeds grow very slowly.  The optimal period for vegetative propagation is spring-summer. The optimal substrate for plants of fam. Agavaceae is the mixture consisting of: fallow soil: peat: garden soil: sand, in a ratio of 2:1:0.5:0.5. Young plants are placed in bright places without direct sunlight, in the warm seasons they must be abundantly watered. In winter, the amount of water is reduced. Plants of the fam. Agavaceae, being very decorative and having a high adaptive potential, can be widely used indoor for ornamental purposes, as solitary plants or in different compositions, as well as outdoors in the warm seasons.