Black-Eyed Susan

How to grow black-eyed Susan

Light

Full sun is best. Plants tolerate a few hours of shade but produce fewer flowers.

Watering

Keep the soil evenly moist during the first year. Established clumps tolerate short dry periods but flower longest with about 1 in (2.5 cm) of water a week.

Soil and feeding

It is not fussy and grows in clay, loam or sandy soil as long as water does not stand in winter. Feed with a layer of compost in spring.

Planting and pruning

Deadhead to prolong flowering, or leave the seedheads for finches and winter structure. Cut down old stems in early spring.

Propagation

Divide clumps every three to four years in spring or early fall. Replant the vigorous outer pieces and discard the tired center.

Common problems

Dark brown or black spots on leaves

Septoria or angular leaf spot, worst in wet summers. Remove affected leaves, thin crowded clumps and clear debris in fall.

Powdery mildew

Improve air flow and avoid overhead watering in the evening.

Clumps spreading too far

Lift and divide, or dig out the edges each spring.

Questions about black-eyed Susan

Is black-eyed Susan a perennial or an annual?

Rudbeckia fulgida is a true perennial. The related Rudbeckia hirta, also called black-eyed Susan, is short-lived and usually grown as an annual or biennial.

When do black-eyed Susans bloom?

From July to September or October in most climates.

Plant details

• Attracts pollinators
• Deer resistant
• Good cut flower
• Good for beginners
• North American native