Black-Eyed Susan

60d to harvest

Velvety petals in warm golden amber flare outward from a nearly inky, button-dark center, creating a sunburst bloom that feels luminous even on the calmest days. Black-Eyed Susan forms sturdy, upright clumps with a graceful, airy presence—its flowers hold their shape and texture beautifully as they sway. Grow it for long-lasting garden color in beds and borders, where its bold, high-contrast blooms make a striking statement from early summer into fall.

Crop Dates

Milestone	Date
Start Indoors	Apr 3rd
Last Frost	May 15th
Transplant / Sow Outdoors	May 15th
Harvest Begins	Jul 14th
Harvest Ends	Sep 1st

Crop Details

Trait	Value
Days to Maturity	60
Sun Requirements	Full Sun
Growth Habit	Upright
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	70
Min Soil Temp (°F)	45
Min Night Temp (°F)	35
Harden Off (days)	7

Recommended Companions

Phenomenal Lavender

Cherry Brandy Coneflower

Rose Rhapsody Salvia

Munstead Lavender

Rhapsody In Blue Salvia

Frequently Asked Questions

How do I prevent and treat powdery mildew on Black-Eyed Susan (Rudbeckia hirta) in humid weather?

Powdery mildew shows up as a white, dusty coating on leaves, usually after warm, humid spells. Improve airflow by spacing plants 12–18 in. apart and watering at the soil line (not the foliage). If it appears, spray with potassium bicarbonate or a labeled fungicide and remove badly affected leaves to slow spread.

How often should I water Black-Eyed Susan during the main growing phase (after seedlings establish)?

Water deeply about 1 inch per week during active growth, then let the top 1–2 in. of soil dry slightly before watering again. In hot, dry weeks you may need 2–3 waterings per week, but always avoid soggy soil since Rudbeckia quickly suffers from root problems. A simple test: if the soil feels dry and crumbly at 1–2 in. down, it’s time to water.