Hortus III lists var. Alnus glutinosa serves as a rootstock for grafting of other alder species. Distribution Throughout the Caucasus, Europe, Siberia, into Asia Minor, Iran, and North Africa. Ranging north to Wyman's Zone 3. For blanket bogs in England, spot sowings have been recommended ca 15 seeds per spot fertilized with ca 60 g phosphate.
Seeds germinate as well under continuous darkness as with normal day lengths.
Seeds can however be sown immediately as soon as ripe. In the U.S., it flowers from March to May, the fruits ripening in fall, natural dispersal occurring from late fall to early spring. References Agriculture Handbook 450. Seeds of woody plants in the United States. Cannell, M.G.R. 1982.