Impact of weather conditions on vegetative propagation of Gladiolus х hybridus hort. in Perm region

Weather conditions have a significant impact on diameter of the corms formed from corms of II and III size and cormels. Corms formed from planting material of the II (average diametr 4.88±0.29 cm), III (average diametr 4.32±0.36 cm) size and cormels (average diametr 1.81±0.14 cm) in hot and dry 2016 year were significantly larger than in cold and rainy 2017 (average diametr respectively 3.57±0.33 cm, 2.78±0.27 cm и 1.40±0.07 cm) and 2018 (average diametr respectively 4.00±0.37 cm, 2.46±0.32 cm и 1.07±0.15 cm). Corms of I size are less affected by weather conditions. In Perm region it is optimal to use corms of I, II, and III size for planting. Cormels form corms of III and IV size, which bloom at the 2nd year. The propagation of gladiolus cultivars by cormels is promising in Perm region.