🌻 Black-Eyed Susan
Rudbeckia hirta
The daisy that skipped sunscreen and owned it.
Sun
Full sun, 6+ hrs
Days to harvest
60–90 days from seed; blooms first year
Spacing
12–18 inches apart
Soil pH
6.0–7.0
How to grow
Direct sow in fall or early spring in Florida — it handles heat better than most daisies but appreciates afternoon shade in the Deep South. It's technically a short-lived perennial often grown as an annual; let it self-seed and you'll never buy it again. Deadhead for rebloom or leave heads for birds.
Water & feeding
Drought-tolerant once established; water during prolonged dry spells. Good drainage matters more than frequent water.
Common problems
- Powdery mildew in humid, crowded plantings
- Septoria leaf spot (black spots on lower leaves)
- Asters yellow (phytoplasma) — pull and destroy affected plants
Harvest
Cut stems when flowers are fully open for bouquets; deadhead to extend bloom into fall. Leave the last flush standing — goldfinches harvest the seeds all winter.
Nerdy fact: Rudbeckia is named for the Rudbeck family of Swedish botanists — father and son, both named Olof. Linnaeus named the genus to honor his mentors, which is the 18th-century version of a dedication page.