How to Grow Black-Eyed Susan From Seed

Black-eyed Susan seed can go into the garden in either spring or fall. For spring sowing, wait until after the last frost when the soil has warmed. For a more natural approach, sow in late fall and let winter cold stratify the seed for a strong flush the following season. If you want blooms the very first summer, start seeds indoors 6 to 8 weeks before your last frost, then transplant out once the weather settles. Sown early enough, Rudbeckia hirta will often flower in its first year.

Pick a sunny, open spot with average, well-drained soil; black-eyed Susan is not fussy and even tolerates poor and clay soils. The one rule that matters most is light: these seeds need light to germinate, so do not bury them. Scatter the seed on the surface and press it gently into contact with the soil, barely covering it if at all. Keep the surface lightly moist until seedlings appear, usually in 1 to 3 weeks. Thin or space plants about 12 to 18 inches apart so they have room to form full, sturdy clumps.

Once established, black-eyed Susan is wonderfully self-sufficient. Water new plantings regularly until the roots take hold, then ease off; mature plants are notably drought tolerant and rarely need extra care. Skip heavy feeding, since these natives thrive in lean conditions. Deadheading through summer keeps the plants tidy and pushes more blooms, but leaving some of the final seed heads standing feeds goldfinches and lets the plant self-sow. Divide established clumps every few years in spring to keep them vigorous.

Black-eyed Susan shines alongside other sun-loving natives and prairie flowers that share its tough, pollinator-friendly nature. Try these non-GMO companions:

Black-eyed Susans are excellent, long-lasting cut flowers with a cheerful, meadow feel. Cut stems in the morning when the flowers have just opened fully and the centers are still firm, then place them straight into water for a vase life of about a week or more. For drying, harvest the seed heads once they turn dark and brittle in fall. Leave a few heads on the plant through winter to feed birds and to let seed drop for next year's volunteers.

Black-eyed Susan is a workhorse of the pollinator and native garden. Its nectar-rich, daisy-like flowers draw bees, butterflies, and beneficial insects all summer, while the fall seed heads are a favorite of goldfinches and other songbirds. Gardeners prize it for naturalizing meadows, filling borders, and supplying armfuls of long-lasting cut flowers. It is also notably deer-resistant, making it a reliable choice where browsing is a problem.

• Seeds not germinating: the most common cause is burying them. Rudbeckia needs light to sprout, so surface sow and only press the seed in rather than covering it.
• Powdery mildew on foliage: a grayish coating common in humid, crowded plantings. Space plants for airflow, water at the base, and remove badly affected leaves.
• Leaf spot or dark blotches: fungal spotting in wet seasons. Clean up debris in fall, avoid overhead watering, and give plants room to dry between waterings.
• Floppy plants in rich soil: overly fertile or shady conditions make growth leggy. Grow in full sun and lean soil for sturdy, self-supporting clumps.
• Short lifespan of individual plants: Rudbeckia hirta is short-lived, but it self-seeds readily. Let some seed heads mature and the patch renews itself year after year.