Black Alder (Alnus glutinosa)

Common names:
Give a thumbs up Black Alder
Give a thumbs up European Alder
Give a thumbs up Common Alder
Give a thumbs up Alder

General Plant Information (Edit)
Plant Habit: Tree
Life cycle: Perennial
Sun Requirements: Full Sun
Full Sun to Partial Shade
Water Preferences: Wet
Wet Mesic
Soil pH Preferences: Moderately acid (5.6 – 6.0)
Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Minimum cold hardiness: Zone 3 -40 °C (-40 °F) to -37.2 °C (-35)
Maximum recommended zone: Zone 7b
Plant Height: 40 to 60 feet, to 100 feet in it's native habitat.
Plant Spread: 20 to 40 feet
Leaves: Deciduous
Fruit: Edible to birds
Flower Color: Other: Male flowers are red, female flowers are purple
Bloom Size: Under 1"
Flower Time: Spring
Underground structures: Taproot
Suitable Locations: Bog gardening
Uses: Windbreak or Hedge
Provides winter interest
Erosion control
Will Naturalize
Useful for timber production
Dynamic Accumulator: Nitrogen fixer
Wildlife Attractant: Birds
Resistances: Humidity tolerant
Pollinators: Wind
Miscellaneous: Tolerates poor soil
Conservation status: Least Concern (LC)

Conservation status:
Conservation status: Least Concern

Photo gallery:

Posted by ILPARW (southeast Pennsylvania - Zone 6b) on Nov 23, 2017 9:55 PM

Native to much of Europe, western Asia, and northern Africa. It has escaped cultivation in eastern North America in some areas and has spread along watercourses and ponds, as I have seen them in northeast Illinois, southeast Pennsylvania, and Delaware. It is sold by some larger diverse nurseries and makes a good-looking, adaptable landscape tree. Fast growing of about 2 to 2.5 feet/year.

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Discussion Threads about this plant
Thread Title Last Reply Replies
Fungal Fest ID by PattiSeptember Dec 24, 2018 2:48 PM 5
Barrage - Alnus glutinosa? by zaca Jun 5, 2017 4:02 AM 2

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