Gray Alder, Speckled Alder

Alnusincana

Family
Betulaceae (beh-tyoo-LAY-see-ee)
Genus
Alnus (AL-nus)
Species
incana (in-KAN-nuh)
Synonym
Sun Exposure
Full Sun
Sun to Partial Shade
Foliage
Deciduous
Height
6-8 ft. (1.8-2.4 m)
8-10 ft. (2.4-3 m)
10-12 ft. (3-3.6 m)
12-15 ft. (3.6-4.7 m)
15-20 ft. (4.7-6 m)
Spacing
12-15 ft. (3.6-4.7 m)
Hardiness
USDA Zone 4a: to -34.4 °C (-30 °F)
USDA Zone 4b: to -31.6 °C (-25 °F)
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
Bloom Color
Inconspicuous/none
Bloom Time
N/A
Other Details
Category
Shrubs
Trees
Water Requirements
Requires consistently moist soil; do not let dry out between waterings
Foliage Color
Where to Grow
Bloom Characteristics
Bloom Size
Other details
Soil pH requirements
5.1 to 5.5 (strongly acidic)
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
Patent Information
Non-patented
Propagation Methods
Seed Collecting
Regional

This plant is said to grow outdoors in the following regions:

Indianapolis, Indiana

Natick, Massachusetts

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Gardener's Notes:

2
positives
0
neutral
0
negative
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Natick, MA | April 2017 | positive

Love this tree. I have had it growing for seven years in my front yard. I have lots of flowers and shrubs as well, but people tend to c...Read More

M
Indianapolis, IN (Zone 5b) | June 2007 | positive

Nice looking trees, dark green foliage and a christmas-tree shape. Just don't believe anything that says 6'-12' height. Maybe multi-trunk...Read More

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