Close-up on yellow flowers.

Senna hebecarpa

Wild Senna

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Wild Senna is a wildflower native to North America that boasts bright yellow flowers and plays a crucial role in supporting local pollinators.

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Bright yellow flowers bloom from July to August on Senna hebecarpa, also known as Wild Senna. The plant thrives in well-drained soils with a pH range of 6.0 to 7.0 and has a medium tolerance to drought. Although it’s not a preferred choice for deer, it does have some deer resistance. Its bushy growth reaches a height of 3 to 6 feet, and it spreads to a width of 3 to 4 feet, making it suitable for the back of borders or naturalized areas. The vibrant yellow flowers attract various pollinators such as butterflies and bees, and it serves as a host plant for certain caterpillars, including Sulphur Butterflies. Senna hebecarpa is a perennial shrub that’s hardy in USDA zones 4 through 8. Its low salt tolerance makes it less suitable for areas with significant salt exposure, such as coastal regions or places where road salt is common. Ideal for meadows, gardens, or open woods, Wild Senna’s medium growth rate and native status make it a valuable addition to many landscapes.

Plant Details:

Plant Type: Perennial, Shrub

New Jersey Native: Yes

Bloom Times: Summer, Late Summer to Fall

Bloom Colors: Yellow

Deer Resistance: Some

Attracts Pollinators and Wildlife: Bees and Other Pollinators, Butterflies

Salt Tolerance: Low to None

Hardiness Zone: 6a, 6b, 7a, 7b

Physiographic Region: All Regions in NJ

Soil Characteristics

Soil Type: Loam, Organic, Sandy, Clay

Soil Moisture: Dry, Moist, Wet

Soil pH: Slightly Acidic, Neutral

Light Needs of Plant

Light Range: Full Sun, Partial Shade

Water Needs of Plant

Soil Moisture: Dry, Moist, Wet

Drought Tolerance: High

Size and Growth Rate

Height: 4 - 6 ft

Spread: 3 - 4 ft

Growth Rate: Medium