Speckled Alder

Speckled Alder Alnus RugosaSpeckled alder (Alnus rugosa) grows in sandy bottomland woods, along streamsides and seeps throughout northeast Iowa.

Hardiness: Zones 3 through 6

Growth Rate: Fast

Mature Shape: Small, thicket forming tree, with an open crown

Height: 25-50 feet

Width: 25-35 feet

Site Requirements: Full sun to partial shade, wide range of soil

Flowering Dates: March - May

Seed Dispersal Dates: September - October

Seed Bearing Age: 5-10 years

Seed Bearing Frequency: Yearly

Seed Stratification: No stratification period is needed.