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

Jan. 20, 2021
Growing Herbs Indoors
Webinar
Register today

Jan. 27, 2021
Low Maintenance Houseplants
for Low Light Situations
Webinar
Register today

Feb. 3, 2021
Organic Control for
Houseplant Pests
Webinar
Register today

Plus, you can watch Melinda's past webinars on demand for a limited time.

Learn More