Continuing a study of the alkaloids of cultivated species of the genus Aconitum L., we investigated the epigeal part of Aconitum paniculatum Lain. and the hypogeal part (roots with rhizomes) of Aconitum ferox Wall ex Seringe cultivated in the Polar-Alpine Botanical Garden. For A. paniculatum, continuing previous research on its alkaloids, we extracted total alkaloids from its epigeal part (stems and leaves) gathered during the budding period by treating air-dry comminuted raw material with sodium carbonate solution followed by chloroform extraction, then extracting alkaloids from the concentrated chloroform solution with 5% sulfuric acid. We isolated lappaconitine, panicudine, paniculamine, and anthranoyllycoctonine via methods including crystallization and chromatography; this is the first time lappaconitine and anthranoyllycoctonine have been isolated from this plant. We did not detect paniculatine and heterophylloidine (panicutine), which are characteristic of the European variety of A. paniculatum, in the cultivated plant. For A. ferox, we studied its alkaloids for the first time, obtaining total alkaloids from its epigeal organs gathered in the period of incipient spring growth. By chromatographing the total alkaloids, we isolated aconitine, songorine, and virescenine. The results show that the alkaloid composition of cultivated A. ferox differs from that of the wild plant.