When to Plant Sweet Potatoes in Caddo County, OK
Sweet potatoes are a warm-season root crop that produces nutritious, sweet tubers in orange, white, and purple varieties. They need a long, hot growing season.
Caddo County, Oklahoma is in USDA Zone 7a. The average last spring frost is April 4 and the first fall frost is November 4, giving you a growing season of approximately 214 days.
At an elevation of 762 feet, Caddo County receives approximately 32.1 inches of rainfall annually with predominantly loam soil. Summer highs average 89°F, providing good warmth for Sweet Potatoes during the growing season.
Caddo County Soil Profile
Soil Type
Loam
Soil pH
6.3-7.4
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
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
Sweet Potatoes Planting Timeline — Caddo County, OK
Sweet Potatoes Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | February 14 | Feb 14 – Feb 28 |
| Transplant Outdoors | April 18 | Apr 18 – May 2 |
| Direct Sow | April 11 | Apr 11 – May 2 |
| Harvest | July 18 | Jul 18 – Sep 5 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Start Indoors |
| March | — |
| April | Transplant Outdoors Direct Sow |
| May | Transplant Outdoors Direct Sow |
| June | — |
| July | Harvest |
| August | Harvest |
| September | Harvest |
| October | — |
| November | — |
| December | — |
Growing Conditions
Sun
Full Sun (6-8+ hours)
Water
Moderate — regular watering
Days to Maturity
90–120 days
Soil pH
5.5 – 6.5
USDA Zone
Zone 7a
Growing Season
214 days
Growing Tips for Caddo County
Plant slips (rooted sprouts) after soil is thoroughly warm. Build raised mounds for better root development. Cure harvested roots at 80-85F for 10 days to develop sweetness.
Companion Planting
Good Companions
Avoid Planting Near
Level Up Your Garden
Sweet Potatoes in Other Locations
Frequently Asked Questions
When should I plant Sweet Potatoes in Caddo County, OK?
Caddo County is in Zone 7a with an average last frost of April 4. Plan your Sweet Potatoes planting based on this frost date — see the calendar above for exact timing.
What planting zone is Caddo County, OK?
Caddo County, Oklahoma is in USDA Hardiness Zone 7a. The average last spring frost is April 4 and first fall frost is November 4.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Caddo County gardeners in Zone 7a organize planting dates, track what's growing, and never miss a planting window.
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