How to Grow Cardinal Flower
Lobelia cardinalis
Your complete guide to growing Cardinal Flower.
When to Plant Cardinal Flower
Planting windows vary by USDA hardiness zone. Look up yours by ZIP code.
Companion Plants for Cardinal Flower
✓ Good companions
Similar moisture and partial shade requirements, creates layered woodland garden
Natural woodland companions that help maintain soil moisture and humidity
Provides contrasting foliage texture while tolerating same moist, shaded environment
Complementary foliage provides backdrop while sharing moist soil preferences
Shares preference for moist soil and partial shade, extends blooming season
Fellow native that attracts beneficial insects and shares similar growing conditions
Both attract hummingbirds and thrive in similar moist, partially shaded conditions
Provides ground cover and retains moisture in the shared shade habitat
✗ Keep away from
Produces juglone which is toxic to many plants including Cardinal Flower
Requires dry, well-drained soil opposite to Cardinal Flower's moist soil needs
Needs dry Mediterranean conditions that conflict with Cardinal Flower's moisture requirements