Green Alder
Alnusviridis

Family: Betulaceae (beh-tyoo-LAY-see-ee)
Genus: Alnus (AL-nus)
Species: viridis (VEER-ih-diss)

Category
Perennials
Shrubs
Trees

Water Requirements
Average Water Needs; Water regularly; do not overwater

Sun Exposure
Full Sun
Sun to Partial Shade
Light Shade

Foliage
Deciduous
Smooth

Foliage Color
Blue-Green

Height
8-10 ft. (2.4-3 m)

Spacing
6-8 ft. (1.8-2.4 m)

Hardiness
USDA Zone 3b: to -37.2 °C (-35 °F)
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)

Where to Grow

Danger
N/A

Bloom Color
Gold (yellow-orange)
Bright Yellow

Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds

Bloom Size

Bloom Time
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall

Other details

Soil pH requirements
4.6 to 5.0 (highly acidic)
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)

Patent Information

Propagation Methods
By dividing the rootball
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; stratify if sowing indoors

Seed Collecting
Allow pods to dry on plant; break open to collect seeds
Properly cleaned, seed can be successfully stored