Common Alder
Alnus glutinosa
Betulaceae · broadleaf · introduced
Quick Facts
Height
65 ft
Spread
32 ft
Growth Rate
Fast
Light
Sun to Part Shade
Soil
Wet Tolerant
Water
Moderate
Hardiness
Zone Zones 4a–8b
Bloom Time
March
Origin
Europe to the Caucasus and Siberia
Phenological Calendar
| Stage | Typical Window |
|---|---|
| Bud break BBCH 07 | Feb 15-Mar 15 |
| Leaf emergence BBCH 11 | Mar 1-Apr 1 |
| Bloom start BBCH 61 | Apr 1-Apr 30 |
| Bloom end / petal fall BBCH 69 | Apr 15-May 15 |
| Fruit/seed development BBCH 71 | Jun 1-Aug 31 |
| Fruit/seed maturity BBCH 85 | Sep 1-Nov 30 |
| Leaf drop BBCH 93 | Oct 15-Nov 30 |
| Dormancy BBCH 97 | Nov 15-Feb 28 |
Diseases (11)
Armillaria ostoyae Armillaria Root Rot
Brown Leaf Blotch
Canker and Stem Diseases
Catkin Hypertrophy and Leaf Curl
Phytophthora cactorum Collar Rot
Drippy Dieback
Various fungi (Phyllosticta spp., Septoria spp., Cercospo... Leaf Spot
Neonectria ditissima Nectria Canker
Phytophthora spp. (P Phytophthora Root Rot
Podosphaera aphanis var. aphanis Powdery Mildew
Thekopsora minima and Naohidemyces vaccinii Rust
Pests (7)
Cultivars (2)
Imperialis
Common name: Imperialis Black Alder; Mature height: 30 ft
Laciniata
Common name: Cutleaf Alder Cutleaf Black Alder