When to Plant Onion in Hardee County, FL
Onions are a fundamental kitchen staple available in yellow, white, and red varieties. Choose long-day, short-day, or intermediate types based on your latitude.
Hardee County, Florida is in USDA Zone 9b. The average last spring frost is January 27 and the first fall frost is December 20, giving you a growing season of approximately 327 days.
At an elevation of 374 feet, Hardee County receives approximately 59.8 inches of rainfall annually with predominantly sand soil. Summer highs average 102°F, so Onion may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Onion will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Onion root diseases.
Hardee County Soil Profile
Soil Type
Sand
Soil pH
4.9-5.8
Drainage
Well Drained
Plant Planting Risk Windows
Percentages indicate frost risk at transplant. The 70% safe window means there is a 30% chance of frost after transplant — suitable for cold-hardy crops or gardeners with frost protection. The 90% safe window is best for tender plants.
Plant Water Budget
Onion Planting Timeline — Hardee County, FL
Onion Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | December 30 | Dec 30 – Jan 13 |
| Transplant Outdoors | January 27 | Jan 27 – Feb 10 |
| Direct Sow | January 6 | Jan 6 – Jan 27 |
| Fall Sowing | October 25 | Oct 25 – Nov 8 |
| Harvest | April 28 | Apr 28 – Jun 16 |
Plant 1" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Start Indoors Transplant Outdoors Direct Sow |
| February | Transplant Outdoors |
| March | — |
| April | Harvest |
| May | Harvest |
| June | Harvest |
| July | — |
| August | — |
| September | — |
| October | Fall Sowing |
| November | Fall Sowing |
| December | Start Indoors |
Growing Conditions
Sun
Full Sun (6-8+ hours)
Water
Moderate — regular watering
Days to Maturity
90–120 days
Soil pH
6 – 7
USDA Zone
Zone 9b
Growing Season
327 days
Growing Tips for Hardee County
Start seeds indoors 8-10 weeks before transplanting. Match day-length type to your latitude. Stop watering when tops begin to fall over and cure bulbs for 2-3 weeks before storage.
Companion Planting
Good Companions
Avoid Planting Near
Level Up Your Garden
Onion in Other Locations
Frequently Asked Questions
When should I plant Onion in Hardee County, FL?
Hardee County is in Zone 9b with an average last frost of January 27. Plan your Onion planting based on this frost date — see the calendar above for exact timing.
What planting zone is Hardee County, FL?
Hardee County, Florida is in USDA Hardiness Zone 9b. The average last spring frost is January 27 and first fall frost is December 20.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Hardee County gardeners in Zone 9b organize planting dates, track what's growing, and never miss a planting window.
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