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Speckled Alder

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Alnus Incana 1 Alnus Incana Alnus Incana 6 Alnus Incana 5 Alnus Incana 4 Alnus Incana 3 Alnus Incana 2

Speckled Alder

Alnus incana

Speckled Alder is a large shrub or small tree reaching 10 to 25 feet in height, often forming dense thickets along streambanks, wetlands, and lake margins. It is recognizable by its smooth, dark bark marked with light-colored lenticels. As a nitrogen-fixing plant, it improves soil fertility, making it valuable in wetland restoration and erosion control. Its dense growth provides excellent wildlife habitat and bank stabilization.

Characteristics

Product Form Tree/Shrub
Type Woody
Sun Full Sun, Partial Sun, Shade
Soil Clay, Loam, Sand/Gravel, Peat, Calcareous
Moisture Mesic, Wet, Aquatic
Average Max Height (Feet) 18
Suggested Plant Spacing (Feet) 10
Bloom month(s) March, April, May, June
Bloom Color or Type Red
Dominance High

Range Maps

Alnus Incana Us Map
Alnus Incana Mn Map

Planting Information

Dig a hole in your planting site slightly larger than the plant’s root system. When placing the plant into the hole, ensure that the soil line remains consistent with its original level in the pot. Fill in around the roots with the excavated soil, gently firming it to eliminate air pockets. Water the plant thoroughly the same day to promote successful establishment.
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