Cultivation potential for blue bean tree (Decaisnea fargesii Franch.; Lardizabalaceae R.Br.) in the Moscow region

The purpose of the study is to establish the possibility of growing Decaisnea fargesii in the conditions of the Moscow Region. The objects of study are D. fargesii shrubs: 3 plants in the Botanical Garden of the Moscow Palace of Pioneers (Centre for Environmental Education of the State Budgetary Educational Institution “Vorobyovy Gory”), 20 plants in the Tsytsin Main Botanical Garden, Russian Academy of Sciences (MBG RAS) (some of which were damaged by a return frost in the spring in the year of the study). The length of annual growths, the length and width of the leaves were measured, the number of shoots and the number of leaflets for each leaf were counted. It was found that the average length of shoots in the GBS RAS in 2018 (damaged by frosts) was 46.67±8.57 cm, in 2019 - 26.91±7.78, in 2018 (not damaged by frosts) - 29.71±3.38, in 2019 - 37.33±5.32 cm; the average length of plant shoots from the Botanical Garden of the Palace of Pioneers in 2016 was 68.50±4.17 cm, in 2017 - 49.17±7.99, in 2018 - 84.54±13.78, in 2019 - 60.77±13.50 cm. The number of shoots in both the GBS RAS and the Botanical Garden of the Palace of Pioneers is increasing from year to year. The number of annual shoots and the number of shoots per plant in the Palace of Pioneers in 2016-2019 increases by more than 2 times. In relatively cold 2017, there was a decrease in shoot growth and the absence of fruiting. The average leaf length of D. fargesii in the Botanical Garden of the Palace of Pioneers is 59.33±3.08 cm, the number of leaflets is 17.83±0.42, the leaf length is 12.38±0.45 cm, the leaf width is 5.92±0.21 cm. It was shown that D. fargesii can be grown in the conditions of the Moscow Region and at the same time regularly bloom and bear fruit.