tree

Alder

Alnus glutinosa

Native

Current-climate suitability

Create a garden to see this

Future-climate resilience

Create a garden to see this

Sun

Sun or shade

Soil moisture

moisture-retentive, waterlogged

Heat tolerance

Up to about 34°C

Cold tolerance

Down to about -30°C

Waterlogging tolerance

5/5

Drought tolerance

2/5

Mature size

8–18 m tall, 6 m spread

Seasonal interest

Spring catkins · Green

Maintenance

low

Wildlife supported

General wildlife value 5/5 (verified species relationships are shown only where structured data exists)

Known risks or warnings

Too large for small gardens.

Toxicity: none

Native status is never inferred from climate similarity. Plants restricted or invasive in a jurisdiction are excluded from recommendations there.

Demonstration data. Climate, plant and retailer records shown here are realistic samples awaiting horticultural validation and live data connections.