perennial

Sweet flag

Acorus calamus

Climate-suitable non-native

Current-climate suitability

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Future-climate resilience

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Sun

Sun or shade

Soil moisture

moisture-retentive, waterlogged

Heat tolerance

Up to about 36°C

Cold tolerance

Down to about -30°C

Waterlogging tolerance

5/5

Drought tolerance

1/5

Mature size

0.6–1 m tall, 0.6 m spread

Seasonal interest

Foliage interest · Green

Maintenance

low

Wildlife supported

General wildlife value 3/5 (verified species relationships are shown only where structured data exists)

Known risks or warnings

Spreads steadily in wet ground.

Toxicity: mild

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.