Black-eyed Susans are the reliable workhorse of the sunny border. Golden petals around dark chocolate centers. Blooms from midsummer until frost. Spreads gracefully without being invasive.
Sun: Full sun. Water: Low. Zones: 3–9. Height: 2–3 ft. Bloom time: Summer to frost.
Plant in well-drained soil in full sun. Very drought tolerant once established. Deadhead to extend blooming or leave seed heads for birds. "Goldsturm" is the most popular cultivar.
常见问题
01 Do black-eyed Susans come back every year?
Yes — Rudbeckia fulgida 'Goldsturm' is a reliable perennial in zones 3–9. Some annual black-eyed Susans (R. hirta) reseed but don't overwinter. Check the species on your tag to know which you have.
02 Do black-eyed Susans spread?
They spread gracefully by short rhizomes and self-seeding, but never aggressively. A single plant expands into a 2–3 foot clump over several years. Deadhead the seed heads if you want to prevent volunteers.
03 Why are my black-eyed Susan leaves spotted and yellowing?
Usually septoria leaf spot — a fungal disease that appears in humid summers. Water at soil level (not overhead), remove infected leaves, and space plants for airflow. 'Goldsturm' is particularly susceptible; newer cultivars like 'American Gold Rush' resist it.