Prairie Horizon Alder (Alnus hirsuta ‘Harbin’): A fast growing tree with good drought tolerance. Purple catkins and brown, cone-like strobiles add winter interest. Height: 11 m; Width: 6 m; Full sun to partial shade. Zone 2.

Photo Credits:
Alder tree – Jeffries Nurseries Ltd Catkins and Strobiles – Wikimedia Commons