When to Plant Pumpkins in Oklahoma
Published: April 24, 2026
Oklahoma gardeners in Zone 7a have a 35-week growing season for pumpkin (March 15 to November 15). The moderate climate supports a full warm-season crop plus a single main harvest. This guide gives exact dates for Oklahoma based on your local frost calendar.
Pumpkin Planting Dates for Oklahoma
| Start seeds indoors | February 22–March 1 |
| Last frost (average) | March 15 |
| Transplant outdoors | March 22–April 1 |
| Direct sow outdoors | March 22–April 1 |
| Expect first harvest | June 5 – June 30 |
| First fall frost (average) | November 15 |
⚠ Count back 75–100 days from desired harvest date. For Halloween harvest, plant late June to mid-July. Plant 1–2 weeks after last frost.
Growing Pumpkins in Oklahoma's Climate
Oklahoma's moderate Zone 7a climate is well-suited to pumpkin with minimal special accommodation. The standard transplant calendar works as written, and harvest windows line up with what seed packets recommend without adjustment.
Succession planting extends your pumpkin harvest significantly in Oklahoma. A second planting 3 to 4 weeks after the first gives you a backup in case of pest pressure and extends the total harvest window into early fall.
Common pumpkin pests to watch for in Oklahoma include Squash Vine Borer and Squash Bug. The first line of defense is companion planting: Corn and Bush Bean planted nearby discourage several of these pests by confusing host-plant identification or repelling adults before they can lay eggs. Weekly garden walks in the early morning catch problems when they're still manageable.
Pumpkin Garden Calendar for Oklahoma
| Month | Task | Notes |
|---|---|---|
| January | — | Dormant season |
| February | Start seeds indoors | Use grow lights; warm soil to 70–75°F for best germination |
| March | Transplant outdoors | Soil temp must be 60°F+; nighttime lows above 50°F |
| April | — | Dormant season |
| May | — | Dormant season |
| June | Peak growth; water 1 inch/week | Monitor for pests daily; stake or support as needed |
| July ← | Continue care | Consistent watering; remove yellow leaves |
| August | — | Dormant season |
| September | — | Dormant season |
| October | — | Dormant season |
| November | First frost approaches | Harvest remaining pumpkin; cover plants on frost nights |
| December | — | Dormant season |
Pumpkin Growing Tips for Oklahoma Gardeners
- •For Halloween pumpkins, count back 75–100 days from October 31 — plant between late June and mid-July in most climates.
- •Plant on hills or mounds to warm soil and improve drainage; two plants per hill is plenty.
- •Oklahoma's moderate climate supports succession planting — sow new transplants or seeds every 3 weeks during spring to extend the harvest window into fall.
- •Rotate pumpkins away from squash, cucumber, and melon beds on a 3-year cycle to break disease cycles.
Companion Planting for Pumpkins in Oklahoma
In Oklahoma's moderate climate, planting pumpkin with Corn and Bush Bean helps deter pests and improve soil. Avoid planting near Potato and Summer Squash, which inhibit pumpkin growth through root chemistry or shared pest pressure. See the full pumpkin companion planting guide for the complete list.
Pumpkins Planting Dates by City in Oklahoma
Top cities in Oklahoma — select for city-level frost dates and planting calendars.
Frequently Asked Questions
When should I plant pumpkin in Oklahoma?
In Oklahoma (Zone 7a), start pumpkin seeds indoors around February 22–March 1 and transplant outdoors around March 22–April 1 — 1 weeks after the state's average last frost of March 15.
What is the last frost date in Oklahoma?
Oklahoma's average last frost date is March 15 in the state's most common Zone 7a. Frost dates vary by city — higher elevations and northern counties run 1 to 3 weeks later than the state average. See the city list below for city-level frost dates.
Can I grow pumpkin year-round in Oklahoma?
Not year-round — Oklahoma's cold season stops pumpkin production. The pumpkin season runs March 15 to November 15, roughly 35 weeks.
What pumpkin varieties grow best in Oklahoma?
For Oklahoma's Zone 7a, consult a local nursery or extension office for pumpkins variety recommendations.
When do I start pumpkin seeds indoors in Oklahoma?
Start pumpkin seeds indoors in Oklahoma around February 22–March 1, which is 3 weeks before the state's average last frost of March 15. Use grow lights and keep soil temperatures at 70–75°F for fastest germination.