When to Plant Black-eyed Susan in USDA Zone 9a
Your June gardening checklist
Welcome to June in Zone 9a. These are the moves that will have the biggest impact on your growing season.
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Bring in the black-eyed susan
If you can't use it all right away, check the food-preservation section of your planner.
Looking ahead to July
- 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 9a, the average last spring frost is around February 10 and the first fall frost is around December 10, giving you a growing season of approximately 303 days.
Black-eyed Susan Planting Timeline — Zone 9a
Where Is USDA Zone 9a?
The map below highlights the states that contain Zone 9a. Click any state to see the Black-eyed Susan planting schedule for that location.
Black-eyed Susan Planting Calendar — Zone 9a
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | December 16 | Dec 16 – Dec 30 |
| Transplant Outdoors | January 27 | Jan 27 – Feb 10 |
| Direct Sow | January 27 | Jan 27 – Feb 17 |
| Bloom | April 7 | Apr 7 – Aug 25 |
· 18" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Transplant Outdoors Direct Sow |
| February | Transplant Outdoors Direct Sow |
| March | — |
| April | Bloom |
| May | Bloom |
| June | Bloom |
| July | Bloom |
| August | Bloom |
| September | — |
| October | — |
| November | — |
| December | Start Indoors |
Free Zone 9a Planting Calendar PDF
Know exactly when to plant every crop in your zone. Get a printable month-by-month calendar customized for Zone 9a 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
20°F to 25°F average annual minimum
Growing Season
303 days (Zone 9a average)
Planting Specifications
| Plant Spacing | 18 inches apart |
| Row Spacing | 24 inches between rows |
Succession Planting Black-eyed Susan in Zone 9a
Sow every 6.9 weeks for continuous harvest throughout the season.
Growing Tips for Black-eyed Susan in Zone 9a
Zone 9a offers a long growing season (~303 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 9a?
In Zone 9a, plan your Black-eyed Susan planting around the average last frost date of February 10. Start seeds indoors around December 16. Direct sow outdoors around January 27. Transplant seedlings around January 27.
Can Black-eyed Susan grow in Zone 9a?
Yes, Black-eyed Susan can grow well in Zone 9a, hardy in USDA zones 3a through 9b. Zone 9a has a growing season of approximately 303 days, which is sufficient for Black-eyed Susan (60-80 days to maturity).
When can I harvest Black-eyed Susan in Zone 9a?
In Zone 9a, expect to harvest Black-eyed Susan from April 7 – August 25. Black-eyed Susan takes 60-80 days from planting to harvest.
What is the last frost date for Zone 9a?
The average last spring frost in Zone 9a is around February 10, and the first fall frost is around December 10. This gives a growing season of approximately 303 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 9a Garden Planner — Free
A 22-page printable planner tailored to Zone 9a. Planting dates, monthly task lists, harvest log, seed inventory, and succession charts — everything you need to plan a full season.