• Rudbeckia triloba
  • Biennial
  • Zones 4–8
  • Yellow
  • Single

Rudbeckia triloba

Brown-eyed Susan

Biennial rudbeckia triloba black-eyed Susan in yellow, blooming in midsummer, late summer, and fall. Profuse small daisy-like flowers with 6 to 12 yellow rays around a brown-purple center disk. USDA zones 4–8.

Cross-referenced · 4 sources

Where to buy

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A Rudbeckia triloba black-eyed Susan flower up close on the plant
A Rudbeckia triloba black-eyed Susan flower up close on the plant

2 / 2

Rudbeckia triloba black-eyed Susan plants in bloom in a garden
Rudbeckia triloba black-eyed Susan plants in bloom in a garden

At a glance

Flower form
Rudbeckia triloba Single
Colors
  • Yellow
Blooms
Midsummer, Late summer, Fall
Vase life
Not grown for cutting
Height
2–5 ft (61–152 cm) Spread: 12–18 in (30–46 cm)
Sunlight
Full sun
Hardiness
USDA zones 4–8 Biennial
Planted as
Plant
Botanical name
Rudbeckia triloba

In the garden

  • Butterflies
  • Seldom severely damaged by deer (Rutgers rating)

Find your frost dates and zone by ZIP code

Origin

Brown-eyed Susan, a biennial or short-lived perennial native to the eastern United States from New England to Minnesota south to Georgia and Oklahoma, that self-seeds freely.

United States

Sources

Where to buy

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    $3.55Checked Oct 14, 2026

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All photos

  • A Rudbeckia triloba black-eyed Susan flower up close on the plant
    A Rudbeckia triloba black-eyed Susan flower up close on the plant
  • Rudbeckia triloba black-eyed Susan plants in bloom in a garden
    Rudbeckia triloba black-eyed Susan plants in bloom in a garden

Questions

Is Rudbeckia triloba hardy in my zone?

Rudbeckia triloba survives winter in the ground in USDA zones 4 to 8. In colder zones treat it as an annual or lift it before the ground freezes.

Does Rudbeckia triloba need full sun?

Rudbeckia triloba grows in full sun.

When does Rudbeckia triloba bloom?

Rudbeckia triloba blooms in midsummer, late summer, and fall.

Is Rudbeckia triloba good for cutting?

Our sources don't list Rudbeckia triloba as a cut flower or give a vase life for it.

See also

See all →
A Prairie Glow black-eyed Susan flower up close on the plant Prairie Glow Brown-eyed Susan with rusty orange and yellow bicolor blooms, 3 to 4 feet, July to October. Rudbeckia trilobaMidsummerTall
A American Gold Rush black-eyed Susan flower up close on the plant American Gold Rush Leaf spot resistant hybrid rudbeckia with golden yellow flowers, 22 to 24 inches, July until frost. Other speciesMidsummerMedium height
A Autumn Forest black-eyed Susan flower up close on the plant Autumn Forest Annual black-eyed Susan with 5 inch blooms in red, yellow and mahogany shades. Rudbeckia hirtaLate springMedium height
A Cherry Brandy black-eyed Susan flower up close on the plant Cherry Brandy Compact black-eyed Susan with single wine-red flowers 3 to 4 inches across. Rudbeckia hirtaEarly summerMedium height

Same colors

See all →
A Cherokee Sunset black-eyed Susan flower up close on the plant Cherokee Sunset AAS winning mix of mostly double black-eyed Susans in orange, gold, bronze and chocolate. Rudbeckia hirtaEarly summerMedium height
A Denver Daisy black-eyed Susan flower up close on the plant Denver Daisy Short-lived perennial black-eyed Susan with brown and gold blooms from midsummer to fall. Rudbeckia hirtaMidsummerMedium height
A Glitters Like Gold black-eyed Susan flower up close on the plant Glitters Like Gold Hybrid black-eyed Susan with 3 inch golden flowers, 2 to 3 feet, July to September. Other speciesMidsummerMedium height
Golda Emanis Giant coneflower with golden spring foliage and tall yellow flowers, June to July. Rudbeckia maximaEarly summerTall

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