Image for Black-Eyed Susan

Black-Eyed Susan

Scientific name

Rudbeckia hirta


Black-Eyed Susan is a popular biennial or a short-lived perennial wildflower species that typically grows about 1 m in height. Its leaves are green, alternately arranged, lance shaped, and covered with bristly hairs giving the leaf a grey/green colour. The flowers are daisy-like, have 8-20 yellow ray florets surrounding numerous dark brown disk florets, and blooms between June and September. The flowers are beneficial to pollinator species, like bees and butterflies. The seeds are also beneficial to wildlife species, like birds and small mammals. This flower blooms for long periods.

Planting conditions

Black-Eyed Susan can grow well in dry to moist conditions with full or partial sun exposure. It grows well in a range of soil types and soil moisture levels. It can tolerate deer grazing, drought, and dry soil but young plants should be watered occasionally during hot summers. This plant is often found in open forests, prairies, fields and meadows, rocky slopes, and roadside ditches.


  • Plant height:
    • Max 1.5m
    • Max 2m
    • Max 3m
    • Any
  • Moisture level:
    • Dry
    • Normal
    • Moist
    • Drought Tolerant
  • Light conditions:
    • Full sun
    • Partial sun
  • Soil type:
    • Sandy
    • Loamy
    • Clay
    • Humus
    • Rocky
  • pH:
    • Normal
  • Depth:
    • Wildflower
  • Eco Zone:
    • 4a
    • 4b
    • 5a
    • 5b
    • 6a
    • 6b
    • 7a
  • Plant type:
    • Wildflower
  • Height:
    • 1 m
  • Spread:
    • 1 m