Common Alder

Botanical Name

Alnus glutinosa

Hardiness

Zones 4 to 7

Height

40 to 60 feet

Width

20 to 40 feet

Flowers

Male catkins, female purplish egg shaped strobile

Fruit

Winged nutlet borne on egg-shaped woody strobile, persistent

Light

Full sun to part shade

Soil

Moist to wet

Planting & Care

Transplants easily in spring
Good tree for reclamation sites
Fixes own nitrogen

Problems

Wooly alder aphid, tent caterpillar, can become invasive

Varieties

Laciniata - dissected leaves
Pyramidalis - upright, narrow spread, good disease resistance

Upcoming Appearances

Oct. 23, 2021
San Diego Fall Home & Garden Show
Del Mar, CA

Oct. 27, 2021
Pruning Tips for Shrubs
Webinar

Nov. 13, 2021
Holiday Specialties at Ebert's
Ixonia, WI

Register today! Plus, watch Melinda's past webinars ON DEMAND
for a limited time.

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