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Southern Catalpa

Catalpa bignonioides, Bignoniaceae

Zones
5–9
Lifespan
Perennial
Growth
Fast

Growing Conditions

Soil pH

5.5 – 7.5

Tolerances

Drought
Frost
Heat
Pest Resistance
Disease Resist.

Companion Plants

Wild CucumberMarah macrocarpa
Physical SupportShade Provision
Perennial Sweet PeaLathyrus latifolius
Nitrogen FixationPhysical Support

Antagonistic Plants

Ground ElderAegopodium podagraria

Large canopy tree creates dense shade that suppresses ground elder, while catalpa may produce mild allelopathic compounds

Common Questions

What zones does Southern Catalpa grow in?

Southern Catalpa grows in USDA hardiness zones 5 through 9.

What are good companion plants for Southern Catalpa?

Good companions for Southern Catalpa include Wild Cucumber, Perennial Sweet Pea.

Design guilds with Southern Catalpa and see companion relationships visually.

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