Blog

When to Plant Turnip in Lafourche Parish, LA

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.

Lafourche Parish, Louisiana is in USDA Zone 9a. The average last spring frost is January 27 and the first fall frost is December 18, giving you a growing season of approximately 325 days.

At an elevation of 306 feet, Lafourche Parish receives approximately 54 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 97ยฐF, so Turnip may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring โ€” great for early planting โ€” but Turnip will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Turnip root diseases.

Lafourche Parish, LA (Zone 9a) Year-round
325 days
Last Spring Frost January 27
325 growing days
First Fall Frost December 18

Lafourche Parish Soil Profile

Soil Type

Sandy Loam

Soil pH

5-6.2

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (245 days to spare)
Transplant: Jan 20 🍅 Harvest: Mar 3 – Apr 7
Recommended (50%) ✓ Fits season (248 days to spare)
Transplant: Jan 27 🍅 Harvest: Mar 10 – Apr 14
Safe Start (90%) ✓ Fits season (219 days to spare)
Transplant: Mar 4 🍅 Harvest: Apr 15 – May 20

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
Watering frequency Only during dry spells
Season total 12 gal / 100 sq ft
Turnip needs ~1,138 GDD — county provides 7,416 GDD Excellent fit

Turnip Planting Timeline โ€” Lafourche Parish, LA

Turnip Planting Calendar

Activity When Date Range
Direct Sow January 6 Jan 6 โ€“ Jan 27
Fall Sowing October 23 Oct 23 โ€“ Nov 6
Harvest February 17 Feb 17 โ€“ Mar 24

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

Month-by-Month Timeline

MonthActivities
January Direct Sow
February Harvest
March Harvest
April โ€”
May โ€”
June โ€”
July โ€”
August โ€”
September โ€”
October Fall Sowing
November Fall Sowing
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 9a

Growing Season

325 days

Growing Tips for Lafourche Parish

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 Lafourche Parish, LA?

Lafourche Parish is in Zone 9a with an average last frost of January 27. Plan your Turnip planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Lafourche Parish, LA?

Lafourche Parish, Louisiana is in USDA Hardiness Zone 9a. The average last spring frost is January 27 and first fall frost is December 18.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Lafourche Parish gardeners in Zone 9a organize planting dates, track what's growing, and never miss a planting window.

Get Your Free Garden Planner →

Free download. Plan your entire garden season in minutes.

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