Protected Series:
Zone: 4
SWEET CONEFLOWER BLACKEYED SUSAN
Rudbeckia subtomentosa, commonly known as the Sweet Coneflower, is a beloved North American native perennial prized for its longevity and charming fragrance. Unlike some of its shorter-lived relatives, Sweet Coneflower forms a dependable, bushy mound of grey-green foliage that remains attractive throughout the growing season. In late summer and into fall, the plant is covered in an abundance of 2 to 3-inch wide flowers featuring brilliant yellow ray petals and a prominent, dark brownish-purple central disk. A unique characteristic of this species is the subtle, sweet scent of vanilla or anise that is released from the blooms and foliage, especially on warm, breezy days, making it a delightful addition to sensory gardens or high-traffic landscape areas.
For the best garden performance, Rudbeckia subtomentosa should be planted in full sun, though it is notably more tolerant of light shade than many other Rudbeckias. It thrives in average to moist, well-drained soil and is particularly well-suited for the Midwest and South due to its excellent tolerance for high heat and humidity. Reaching a mature height of 3 to 4 feet, it provides a sturdy mid-to-back border presence that rarely requires staking. It is highly resistant to many of the foliar diseases that affect other species, maintaining a clean look until frost.
| PLANT | SIZE | TYPE | GALENA | ADD'L | DIG | SOON |
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To help this plant settle in and thrive, we recommend these standard planting practices: Plant in well-draining soil with a slightly acidic pH. Water regularly, but avoid overwatering. Provide full sun to partial shade, depending on the color of the flowers.
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