When to Plant Black-eyed Susan in USDA Zone 9b
Zone 9b gardeners: here's your June plan
Your Zone 9b garden is entering a new phase. Here's what's on the schedule for June and why each task matters now.
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Pick black-eyed susan
If you can't use it all right away, check the food-preservation section of your planner.
July prep starts now
- First harvests: black-eyed susan
Rudbeckia hirta (Black-eyed Susan) is one of the most recognizable and adaptable native wildflowers in North America. Its bright golden-yellow daisy petals radiate from a dark brown central cone, providing months of color from midsummer into fall. Technically a short-lived perennial that self-seeds freely — colonies persist indefinitely in the garden — it thrives in poor soils, tolerates drought, and is irresistible to bees, butterflies, and goldfinches.
In Zone 9b, the average last spring frost is around January 25 and the first fall frost is around December 20, giving you a growing season of approximately 329 days.
Black-eyed Susan Planting Timeline — Zone 9b
Where Is USDA Zone 9b?
The map below highlights the states that contain Zone 9b. Click any state to see the Black-eyed Susan planting schedule for that location.
Black-eyed Susan Planting Calendar — Zone 9b
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | November 30 | Nov 30 – Dec 14 |
| Transplant Outdoors | January 11 | Jan 11 – Jan 25 |
| Direct Sow | January 4 | Jan 4 – Jan 25 |
| Bloom | March 22 | Mar 22 – Aug 9 |
· 18" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Transplant Outdoors Direct Sow |
| February | — |
| March | Bloom |
| April | Bloom |
| May | Bloom |
| June | Bloom |
| July | Bloom |
| August | Bloom |
| September | — |
| October | — |
| November | Start Indoors |
| December | Start Indoors |
Free Zone 9b Planting Calendar PDF
Know exactly when to plant every crop in your zone. Get a printable month-by-month calendar customized for Zone 9b with start dates, transplant windows, and harvest times.
Growing Conditions
Sun
Full Sun (6-8+ hours)
💧 Water
Low — drought tolerant
Days to Maturity
60–80 days
Soil pH
6 – 7
Zone Temperature Range
25°F to 30°F average annual minimum
Growing Season
329 days (Zone 9b average)
Planting Specifications
| Plant Spacing | 18 inches apart |
| Row Spacing | 24 inches between rows |
Succession Planting Black-eyed Susan in Zone 9b
Sow every 6.9 weeks for continuous harvest throughout the season.
Growing Tips for Black-eyed Susan in Zone 9b
Zone 9b offers a long growing season (~329 days). You can plant Black-eyed Susan earlier and may get multiple harvests.
Start seeds indoors 8–10 weeks before last frost or direct-sow after last frost (needs light to germinate — press seeds onto soil surface, do not cover). Thrives in average to poor soil; rich soil causes floppy stems. Deadhead for extended bloom but leave some seed heads for winter wildlife interest and self-seeding. Although technically short-lived (3–5 years), prolific self-seeding maintains the colony. Year 2+ plants bloom most heavily. Divide every 3 years to maintain vigor.
Companion Planting
Good Companions
The Gardener's Encyclopedia to Companion Planting
The pairings that make vegetables, herbs, and flowers grow better — and the ones that quietly wreck a bed.
- Proven pairings for 200+ vegetables, herbs, flowers, and fruits
- Full seed-starting + planting schedule with timing and spacing
- Bonus: square-foot gardening guide + printable seasonal planners
Saving Black-eyed Susan Seeds
Recommended for Your Garden
Reduce heat stress and sun scorch in hot climates with UV-stabilized shade cloth.
Start seeds indoors with reusable cell trays and humidity domes.
Test your soil pH, nitrogen, phosphorus, and potassium levels before planting.
Related Plants
Black-eyed Susan in Other Zones
Black-eyed Susan by State
- Alabama
- Alaska
- Arizona
- Arkansas
- California
- Colorado
- Connecticut
- Delaware
- Florida
- Georgia
- Hawaii
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana
- Maine
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Mississippi
- Missouri
- Montana
- Nebraska
- Nevada
- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- Rhode Island
- South Carolina
- South Dakota
- Tennessee
- Texas
- Utah
- Vermont
- Virginia
- Washington
- West Virginia
- Wisconsin
- Wyoming
Frequently Asked Questions
When should I plant Black-eyed Susan in Zone 9b?
In Zone 9b, plan your Black-eyed Susan planting around the average last frost date of January 25. Start seeds indoors around November 30. Direct sow outdoors around January 4. Transplant seedlings around January 11.
Can Black-eyed Susan grow in Zone 9b?
Yes, Black-eyed Susan can grow well in Zone 9b, hardy in USDA zones 3a through 9b. Zone 9b has a growing season of approximately 329 days, which is sufficient for Black-eyed Susan (60-80 days to maturity).
When can I harvest Black-eyed Susan in Zone 9b?
In Zone 9b, expect to harvest Black-eyed Susan from March 22 – August 9. Black-eyed Susan takes 60-80 days from planting to harvest.
What is the last frost date for Zone 9b?
The average last spring frost in Zone 9b is around January 25, and the first fall frost is around December 20. This gives a growing season of approximately 329 days. These are 50% probability dates — actual frost dates vary year to year.
What should I plant next to Black-eyed Susan?
Good companion plants for Black-eyed Susan include Echinacea, Coreopsis, Yarrow, Salvia. These companions can help with pest control, pollination, and nutrient sharing.
Your Zone 9b Garden Planner — Free
A 22-page printable planner tailored to Zone 9b. Planting dates, monthly task lists, harvest log, seed inventory, and succession charts — everything you need to plan a full season.