American Senna is a large shrub-like plant that is perfect for rain gardens due to its resistance to occasional flooding and preference for moist soil. It’s also a great choice for windy areas or for use as a hedge because its horizontal root system makes it resistant to being blown over. The bright yellow flowers attract a multitude of pollinators and its seed pods are popular with large birds, such as wild turkey and bobwhites.

Care requirements:

Light requirements: Full Sun-Part Shade

Water requirements: Medium

Soil requirements: Medium-Moist, well-drained

Bloom time: July-August

Bloom color: Yellow

Height: 4-6 feet

Width: 3-4 feet

USDA Zone: 4-8

Larval host: Cloudless Sulphur, Orange Barred Sulphur, Silver Spotted Skipper butterflies

Other notes: American Senna prefers moist, loamy soils but can also tolerate rocky and sandy soils. When it is grown in very rich soil, it may flop over and need to be staked. It can tolerate occasional flooding and can spread fairly quickly, so be sure to cut off seed pods to control the number of plants. The seeds remain through winter, providing visual interest. While American Senna can grow in part shade, best flowering will be in full sun. It is also drought tolerant.

Do you have American Senna growing in your garden? Do you have any tips or tricks for growing it you would like to share? Do you know of any Southeastern nurseries that regularly stock it? Let us know in the comments!