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When to Plant Rutabaga in Hardeman County, TX

Hardeman County, Texas Zone 7b May

Your May gardening checklist

A quick May briefing for Hardeman County, Texas gardeners — what's urgent, what's next, and what can wait.

Avg. last frost March 30
Avg. first frost November 7
Soil temp (4") 65°F
Watering Low
Pest pressure Moderate
Daylight 13.8 hrs
June will be here before you know it — start on
  • First harvests: rutabaga

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Rutabagas are a cross between turnips and cabbage, producing large yellow-fleshed roots with a sweet, mild flavor. They are excellent mashed, roasted, or in stews.

Hardeman County, Texas is in USDA Zone 7b. The average last spring frost is March 30 and the first fall frost is November 7, giving you a growing season of approximately 222 days.

At an elevation of 2,010 feet, Hardeman County receives approximately 47.8 inches of rainfall annually with predominantly loam soil. Summer highs average 89°F, providing good warmth for Rutabaga during the growing season.

Hardeman County, TX (Zone 7b) Long season
222 days
Last Spring Frost March 30
222 growing days
First Fall Frost November 7
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Hardeman County Soil Profile

Soil Type

Loam

Soil pH

6.7-7.3

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (100 days to spare)
Transplant: Mar 23 🍅 Harvest: Jun 15 – Jul 20
Recommended (50%) ✓ Fits season (103 days to spare)
Transplant: Mar 30 🍅 Harvest: Jun 22 – Jul 27
Safe Start (90%) ✓ Fits season (100 days to spare)
Transplant: Apr 15 🍅 Harvest: Jul 8 – Aug 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.

Soil Compatibility in Hardeman County

How your county's soil matches Rutabaga's growing requirements.

Soil pH

Your soil pH (6.7–7.3) is within Rutabaga's preferred range (6.0–7.5).

Soil Texture

The loam soil in Hardeman County is excellent for Rutabaga — good drainage, moisture retention, and nutrient holding capacity.

Drainage

Drainage is adequate for Rutabaga.

Organic Matter

Organic matter is moderate (2.4%). Annual compost additions will help Rutabaga.

How to Plant Rutabaga

1"
Planting Depth
15"
Between Plants
24"
Between Rows

Fall planting: Sow 10 weeks before your first frost date for a fall harvest.

Succession Planting Rutabaga

3
successive plantings in your 222-day season

Sow every 9.1 weeks. Last sowing by Jul 30 to harvest before frost.

For a dedicated fall crop, sow by Aug 29.

Plant Water Budget

Plant needs
0.7″/week
Rainfall provides
0.9″/week
You supply
0.0″/week
Watering frequency Only during dry spells
Season total 13 gal / 100 sq ft
Drought risk

Water stress score is 6/10 — consider drought-tolerant varieties and mulching

Monthly Watering Guide for Rutabaga

Rutabaga needs approximately 0.7 inches of water per week (3" per month). Here's how your county's rainfall compares month by month.

Month Rutabaga Needs Rainfall You Supplement Action
Jan 1.4" 0" ❄️ Dormant
Feb 1.4" 0" ❄️ Dormant
Mar 3" 3" 0" ✅ Rainfall sufficient
Apr 3" 4.7" 0" ✅ Rainfall sufficient
May 3" 7.5" 0" ✅ Rainfall sufficient
Jun 3" 7.1" 0" ✅ Rainfall sufficient
Jul 3" 6.7" 0" ✅ Rainfall sufficient
Aug 3" 5.3" 0" ✅ Rainfall sufficient
Sep 3" 5.1" 0" ✅ Rainfall sufficient
Oct 3" 3" 0" ✅ Rainfall sufficient
Nov 3" 1.5" 1.5" 🚿 Regular watering
Dec 1.1" 0" ❄️ Dormant

Water needs are for active growing months only (Mar–Nov in Hardeman County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.

Rutabaga Heat Requirements (GDD)

What are Growing Degree Days (GDD)?

Growing Degree Days measure the total warmth your plants receive during the growing season. Think of it as a "heat bank" — every day above 50°F deposits warmth that helps your plants grow.

Each plant needs a certain amount of accumulated heat to mature. If your county provides more GDD than the plant needs, it's a great fit. If it's close, you may want to choose faster-maturing varieties or start seeds indoors to get a head start.

Rutabaga needs ~1,508 GDD — county provides 3,718 GDD Excellent fit

Rutabaga Planting Timeline — Hardeman County, TX

Rutabaga Planting Calendar

Activity When Date Range
Direct Sow March 16 Mar 16 – Apr 6
Harvest June 8 Jun 8 – Jul 13
Fall Sowing August 29 Aug 29 – Sep 12

Plant 1" deep · 15" apart · Rows 24" apart

Month-by-Month Timeline

MonthActivities
January
February
March Direct Sow
April Direct Sow
May
June Harvest
July Harvest
August Fall Sowing
September Fall Sowing
October
November
December
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Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.7"/week · Only during dry spells

📅 Days to Maturity

80–100 days

🧪 Soil pH

Needs 6–7.5 · Your soil: ideal

🗺️ USDA Zone

Zone 7b

📆 Growing Season

222 days in Hardeman County

Growing Tips for Rutabaga in Hardeman County

Direct sow Rutabaga outdoors after March 30 in Hardeman County when soil has warmed and frost danger has passed.

Common pests for Rutabaga in this region include cabbage worm and flea beetles. Use row covers early in the season and inspect plants weekly.

General growing tips

Direct sow in early summer for fall harvest. Thin seedlings to 6-8 inches apart. Flavor improves significantly after a few light frosts.

Companion Planting

Good Companions

Avoid Planting Near

  • Potatoes

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Rutabaga in Hardeman County, TX?

Hardeman County is in Zone 7b with an average last frost of March 30. Plan your Rutabaga planting based on this frost date — see the calendar above for exact timing.

What planting zone is Hardeman County, TX?

Hardeman County, Texas is in USDA Hardiness Zone 7b. The average last spring frost is March 30 and first fall frost is November 7.

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Your Hardeman County Garden Planner — Free

A 24-page printable planner built for Hardeman County (Zone 7b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.

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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 Hardeman County, TX. Local conditions may vary. Last updated: May 2026.

Sources & credits

Every number on this page traces back to a primary horticulture or government data source. Click through to verify.