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Cut flowers1 variety
Black-Eyed Susan
Rudbeckia hirtaShort-lived perennial wildflower with golden rays around dark centers and long-lasting cut flowers.
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Days to maturity
100–120 daysDays to germ.
7–30 daysSpacing
6–8 inHeight
12–27 inSun
Sun, Partial ShadeHow we grow it
Germination
- Days to germ.
- 7–30 d
- Depth
- 0.25 in
Culture
- Days to maturity
- 100–120 d
- Spacing
- 6–8 in
- Height
- 12–27 in
- Sun
- Sun, Partial Shade
- Frost
- tender
- Hardiness zones
- 3–9
Harvest
Timing · Zone 5a
JanFebMarAprMayJunJulAugSepOctNovDec
Sow indoorsApr 9
Outdoor / directMay 21 – Jun 18
Windows are anchored to an average last frost of May 21 (1 year in 10 as early as Apr 29, as late as Jun 2) and an average first frost of Sep 18 (1 year in 10 as early as Sep 6, as late as Oct 8). In a late or early year, slide them with it.
Compare in the calendarTrials
Every Black-Eyed Susan sowingSeed sources, counts, ratings, and the observations kept against each one.Black-Eyed Susan trials