When to Plant Turnips in Oklahoma City, OK
Published: April 24, 2026
Turnip Planting Dates for Oklahoma City, OK
| Start seeds indoors | Year-round |
| Last frost (average) | March 15 |
| Direct sow outdoors | February 22–March 4 |
| Minimum soil temperature | 40°F |
| Expect first harvest | March 29 – April 23 |
| Fall crop planting | September 20–30 |
| Fall crop harvest | October 25 |
| First fall frost (average) | November 15 |
⚠ Direct sow turnips 2–4 weeks before last frost for spring crop. Best planted in late summer (6–8 weeks before first fall frost) for fall harvest — frost sweetens the roots. Fast-growing: some varieties ready in just 35 days.
Best Turnip Varieties for Oklahoma City, OK
Consult a Oklahoma City-area nursery or your state extension office for turnip varieties proven in Zone 7a.
Growing Turnips in Oklahoma City
Oklahoma City sits in Zone 7a, with an average last frost of March 15 and first fall frost around November 15 — giving a 245-day frost-free growing season. Cool-season crops like turnip benefit from Oklahoma City's cooler spring and fall windows, when temperatures stay in the 55–75°F sweet spot that produces the best flavor and least bolting.
Oklahoma City's moderate climate supports turnip on the standard transplant calendar with minimal special accommodation. Succession planting — sowing fresh seeds or setting new transplants every 2–3 weeks through spring — stretches the harvest window and gives you a backup crop if pests hit the first planting.
Oklahoma City's heavy clay soil benefits from raised beds or deep organic matter amendment before planting turnip. Clay retains moisture well but compacts easily — add 3 to 4 inches of compost and work it in to 12 inches before planting. Consistent watering (1 inches per week) is especially important in clay soil, which can crack and pull away from roots during dry spells; mulch around plants to stabilize moisture.
Turnip Calendar for Oklahoma City
| Month | Task |
|---|---|
| Year | Start seeds indoors under grow lights |
| March | Last frost — soil warming, prepare bed |
| February | Direct sow seeds into warm soil |
| March | Expect first harvest window to open |
| September | Start fall crop — transplants or direct sow |
| November | First fall frost — harvest remaining, end of outdoor season |
Turnip Tips for Oklahoma City Gardeners
- •Thin seedlings to 4-inch spacing when plants are 3 inches tall — crowded turnips produce small woody roots.
- •Both roots AND greens are edible — harvest baby turnip greens 4 weeks after sowing, roots 5–9 weeks.
- •Succession plant turnip in Oklahoma City every 2–3 weeks through spring to extend the harvest window into summer.
Common Turnip Pests in Oklahoma City
- •Flea Beetle — peaks July in Zone 7a (active May–September); tiny black beetles that riddle leaves with holes; row covers protect seedlings.
- •Aphid — peaks July in Zone 7a (active May–September); monitor closely during peak season and treat early.
- •Cabbage Root Maggot — peaks July in Zone 7a (active May–September); monitor closely during peak season and treat early.
Check plants every 2–3 days during peak season — early intervention prevents most infestations from becoming serious.
What to Plant with Turnips in Oklahoma City
In Oklahoma City's moderate climate, Pea and Mint are the most beneficial plants to grow alongside turnip. Pea improves nearby plant health and pest resistance. Keep turnip away from Potato — it competes for nutrients and shares blight diseases.
Frequently Asked Questions
When should I plant turnip in Oklahoma City, OK?
In Oklahoma City (Zone 7a), direct sow turnip around February 22–March 4. Soil must be at 40°F or warmer at 2-inch depth before sowing — cold soil rots the seeds.
What zone is Oklahoma City, OK for turnip growing?
Oklahoma City is USDA Zone 7a. For turnip, this means a frost-free growing season of roughly 35 weeks running from March 15 to November 15. Cool-season crops like turnip thrive in this zone with both spring and fall planting windows available.
When is turnip harvest season in Oklahoma City?
Expect the first turnip harvest in Oklahoma City around March 29, with harvest continuing through April 23. This is based on 35–60 days from transplant or direct sow. A fall crop planted September 20–30 adds a second harvest around October 25.
How long does it take to grow turnip in Oklahoma City, OK?
From transplant or direct sow to first harvest, turnip takes 35–60 days in Oklahoma City's climate. Based on a typical planting date of February 22–March 4, expect your first harvest around March 29. Oklahoma City's Zone 7a transition-zone climate produces maturity times right in the middle of the stated range.
What soil does turnip need in Oklahoma City?
Oklahoma City's heavy clay soil compacts easily and drains slowly — problematic for turnip which needs oxygenated roots. Build a raised bed or amend deeply with 3–4 inches of compost worked into the top 12 inches. Add gypsum if the soil is severely compacted. Consistent watering matters especially in clay because the soil can crack and pull away from roots during dry spells.