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Black Alder
Catalogue A# 2018-NA  WW5A
GPS 45D 43' 56" N / 108D 37' 15" W

These specimens are non-accessioned. More information and photos forthcoming.

Location: Waterways, along west side of path next to wall

Number in accession: 3

This 20 inch Black Alder provides overall benefits of: $139 every year. 

​Tree or Plant Type: Tree
        Foliage: Deciduous (seasonally loses leaves)
        Native Locale: Non-native
        Size Range: Large tree (more than 40 feet)
Mature Height: 40-60 feet
Mature Width: 20-40 feet
        Light Exposure: Full sun (6 hrs direct light daily), Partial sun/shade (4-6 hrs light daily)
        Hardiness Zones: Zone 4, Zone 5 (Chicago), Zone 6, Zone 7
        Soil Preference: Wet soil
        Acid Soils: Tolerant
        Alkaline Soils: Tolerant
        Salt Spray: Intolerant
        Soil Salt: Intolerant
        Drought Conditions: Moderately Tolerant
        Poor Drainage: Tolerant
        Planting Considerations: Excessive sucker growth
        Ornamental Interest: Persistent fruit/seeds, Attractive bark
        Flower Color & Fragrance: Inconspicuous
        Shape or Form: Pyramidal
        Growth Rate: Fast
        Transplants Well: Yes
        Wildlife: Nesting birds, Seed-eating birds, Small mammals


European black alder has invasive traits that enable it to spread aggressively. This tree is under observation and may be listed on official invasive species lists in the near future. Review of risks should be undertaken before selecting this tree for planting sites. Growing 40 to 60 feet tall, black alder is typically tall and narrow but sometimes pyramid-shaped. It can be identified by its large, glossy green, oval to round leaves with a toothed margin; dangling catkins in early spring; and cone-like fruits, in fall. Young leaves and shoots are often sticky from a resin. The seed are dispersed by wind and, if they fall on water, can be spread for long distances.

overallbenefitsFRPE20Park or other vacan
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