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When to Plant Turnip in St. Bernard 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.

St. Bernard Parish, Louisiana is in USDA Zone 9a. The average last spring frost is February 2 and the first fall frost is December 11, giving you a growing season of approximately 312 days.

At an elevation of 455 feet, St. Bernard Parish receives approximately 51.7 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 104ยฐF, 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.

St. Bernard Parish, LA (Zone 9a) Year-round
312 days
Last Spring Frost February 2
312 growing days
First Fall Frost December 11

St. Bernard Parish Soil Profile

Soil Type

Sandy Loam

Soil pH

5.2-6.5

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (241 days to spare)
Transplant: Jan 22 🍅 Harvest: Mar 5 – Apr 9
Recommended (50%) ✓ Fits season (235 days to spare)
Transplant: Feb 2 🍅 Harvest: Mar 16 – Apr 20
Safe Start (90%) ✓ Fits season (218 days to spare)
Transplant: Mar 5 🍅 Harvest: Apr 16 – May 21

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
0.0″/week
Watering frequency Only during dry spells
Season total 17 gal / 100 sq ft
Turnip needs ~1,400 GDD — county provides 8,764 GDD Excellent fit

Turnip Planting Timeline โ€” St. Bernard Parish, LA

Turnip Planting Calendar

Activity When Date Range
Direct Sow January 12 Jan 12 โ€“ Feb 2
Fall Sowing October 16 Oct 16 โ€“ Oct 30
Harvest February 23 Feb 23 โ€“ Mar 30

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

Month-by-Month Timeline

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

Growing Season

312 days

Growing Tips for St. Bernard 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 St. Bernard Parish, LA?

St. Bernard Parish is in Zone 9a with an average last frost of February 2. Plan your Turnip planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is St. Bernard Parish, LA?

St. Bernard Parish, Louisiana is in USDA Hardiness Zone 9a. The average last spring frost is February 2 and first fall frost is December 11.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help St. Bernard Parish gardeners in Zone 9a 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 St. Bernard Parish, LA. Local conditions may vary. Last updated: April 2026.