Zone 4 · Black-Eyed Susan
Planting Black-Eyed Susan in Zone 4
Rudbeckia hirta
✅ Black-Eyed Susan thrives in zone 4 (hardy 3–9)
Can I plant today?
⏳ Too early to direct-sow
Last frost is in 4 weeks. Wait until soil warms.
Evaluated for April 27, 2026 ·
Zone's last frost
around May 15
Zone's first frost
around September 15
Bloom window
July – October
Peak bloom
August
Sun required
full sun, part sun
Mature height
28"
Spacing
18" apart
Type
perennial
How to plant Black-Eyed Susan in zone 4
Plant transplants after last frost. Drought tolerant once established.
Pair with these for continuous bloom
Black-Eyed Susan peaks in August. These companions keep your bed in color before and after.
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