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When to Plant Turnip in Kay County, OK

Turnips are a fast-growing cool-season root vegetable with edible roots and greens. Baby turnips are sweet and tender while mature ones are more pungent.

Kay County, Oklahoma is in USDA Zone 6b. The average last spring frost is April 12 and the first fall frost is October 25, giving you a growing season of approximately 196 days.

At an elevation of 549 feet, Kay County receives approximately 31.5 inches of rainfall annually with predominantly loam soil. Summer highs average 89ยฐF, providing good warmth for Turnip during the growing season.

Kay County, OK (Zone 6b) Moderate season
196 days
Last Spring Frost April 12
196 growing days
First Fall Frost October 25

Kay County Soil Profile

Soil Type

Loam

Soil pH

6.8-7.2

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (119 days to spare)
Transplant: Apr 5 🍅 Harvest: May 17 – Jun 21
Recommended (50%) ✓ Fits season (119 days to spare)
Transplant: Apr 12 🍅 Harvest: May 24 – Jun 28
Safe Start (90%) ✓ Fits season (123 days to spare)
Transplant: Apr 26 🍅 Harvest: Jun 7 – Jul 12

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

Plant needs
1.0″/week
Rainfall provides
0.7″/week
You supply
0.4″/week
Watering frequency 1-2 times/week
Season total 680 gal / 100 sq ft
Drought risk

Water stress score is 6/10 โ€” consider drought-tolerant varieties and mulching

Turnip needs ~838 GDD — county provides 3,283 GDD Excellent fit

Turnip Planting Timeline โ€” Kay County, OK

Turnip Planting Calendar

Activity When Date Range
Direct Sow March 29 Mar 29 โ€“ Apr 19
Fall Sowing August 16 Aug 16 โ€“ Aug 30
Harvest May 10 May 10 โ€“ Jun 14

Plant 0.5" deep ยท 4" apart ยท Rows 12" apart

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March Direct Sow
April Direct Sow
May Harvest
June Harvest
July โ€”
August Fall Sowing
September โ€”
October โ€”
November โ€”
December โ€”

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

40โ€“60 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 6b

Growing Season

196 days

Growing Tips for Kay County

Direct sow in early spring or late summer. Harvest when roots are 2-3 inches in diameter for best flavor. Both the roots and the greens are nutritious and edible.

Companion Planting

Good Companions

Avoid Planting Near

  • Potatoes

Level Up Your Garden

Frequently Asked Questions

When should I plant Turnip in Kay County, OK?

Kay County is in Zone 6b with an average last frost of April 12. Plan your Turnip planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Kay County, OK?

Kay County, Oklahoma is in USDA Hardiness Zone 6b. The average last spring frost is April 12 and first fall frost is October 25.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Kay County gardeners in Zone 6b organize planting dates, track what's growing, and never miss a planting window.

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Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Kay County, OK. Local conditions may vary. Last updated: April 2026.