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When to Plant Mustard Greens in McCulloch County, TX

McCulloch County, Texas Zone 8b May

May to-do list for McCulloch County, Texas

Your McCulloch County, Texas garden is entering a new phase. Here's what's on the schedule for May and why each task matters now.

Avg. last frost March 17
Avg. first frost November 16
Soil temp (4") 73°F
Watering Low
Pest pressure High
Daylight 13.6 hrs
  1. Harvest mustard greens as they ripen

    Check every 1–2 days. Many of these get tough or go to seed if you wait too long.

Before June arrives, get these ready
  • First harvests: mustard greens

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Mustard greens are fast-growing brassicas with a spicy, peppery kick. They come in green, red, and purple varieties and are excellent cooked or in salads.

McCulloch County, Texas is in USDA Zone 8b. The average last spring frost is March 17 and the first fall frost is November 16, giving you a growing season of approximately 244 days.

At an elevation of 1,250 feet, McCulloch County receives approximately 60.1 inches of rainfall annually with predominantly loam soil. Summer highs average 96°F, so Mustard Greens may need afternoon shade and extra watering during peak heat. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Mustard Greens root diseases.

McCulloch County, TX (Zone 8b) Long season
244 days
Last Spring Frost March 17
244 growing days
First Fall Frost November 16
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McCulloch County Soil Profile

Soil Type

Loam

Soil pH

6.8-7.7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (150 days to spare)
Start indoors: Feb 1 Transplant: Mar 8 🍅 Harvest: Apr 12 – Jun 14
Recommended (50%) ✓ Fits season (146 days to spare)
Start indoors: Feb 10 Transplant: Mar 17 🍅 Harvest: Apr 21 – Jun 23
Safe Start (90%) ✓ Fits season (143 days to spare)
Start indoors: Mar 4 Transplant: Apr 8 🍅 Harvest: May 13 – Jul 15

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 McCulloch County

How your county's soil matches Mustard Greens's growing requirements.

Soil pH

Your soil pH (6.8–7.7) is more alkaline than Mustard Greens prefers (6.0–7.0). Add sulfur or peat moss to lower pH.

Soil Texture

The loam soil in McCulloch County is excellent for Mustard Greens — good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

Organic matter is low (1.9%). Add 2-3 inches of compost before planting Mustard Greens.

How to Plant Mustard Greens

0.5"
Planting Depth
6"
Between Plants
12"
Between Rows

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

Succession Planting Mustard Greens

9
successive plantings in your 244-day season

Sow every 3.4 weeks. Last sowing by Sep 27 to harvest before frost.

For a dedicated fall crop, sow by Sep 07.

Plant Water Budget

Plant needs
0.7″/week
Rainfall provides
1.0″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Drought risk

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

Monthly Watering Guide for Mustard Greens

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

Month Mustard Greens Needs Rainfall You Supplement Action
Jan 1.8" 0" ❄️ Dormant
Feb 1.9" 0" ❄️ Dormant
Mar 3" 3.5" 0" ✅ Rainfall sufficient
Apr 3" 6.6" 0" ✅ Rainfall sufficient
May 3" 9.8" 0" ✅ Rainfall sufficient
Jun 3" 8.6" 0" ✅ Rainfall sufficient
Jul 3" 8" 0" ✅ Rainfall sufficient
Aug 3" 7" 0" ✅ Rainfall sufficient
Sep 3" 5.1" 0" ✅ Rainfall sufficient
Oct 3" 3.9" 0" ✅ Rainfall sufficient
Nov 3" 2.2" 0.8" 💧 Light watering
Dec 1.7" 0" ❄️ Dormant

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

Mustard Greens 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.

Mustard Greens needs ~880 GDD — county provides 5,368 GDD Excellent fit

Mustard Greens Planting Timeline — McCulloch County, TX

Mustard Greens Planting Calendar

Activity When Date Range
Start Indoors February 10 Feb 10 – Feb 24
Transplant Outdoors March 17 Mar 17 – Mar 31
Direct Sow March 3 Mar 3 – Mar 24
Harvest April 21 Apr 21 – Jun 23
Fall Sowing September 7 Sep 7 – Sep 21

Plant 0.5" deep · 6" apart · Rows 12" apart

Month-by-Month Timeline

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

☀️ Sun

Partial Shade (3-6 hours)

💧 Water

0.7"/week · Natural rainfall sufficient

📅 Days to Maturity

30–50 days

🧪 Soil pH

Needs 6–7 · Your soil: too_alkaline

🗺️ USDA Zone

Zone 8b

📆 Growing Season

244 days in McCulloch County

Growing Tips for Mustard Greens in McCulloch County

Direct sow Mustard Greens outdoors after March 17 in McCulloch County when soil has warmed and frost danger has passed.

With summer highs reaching 96°F in McCulloch County, provide afternoon shade for Mustard Greens and water deeply in the morning.

Your generous 244.0-day season in McCulloch County allows multiple plantings of Mustard Greens. Sow every 15.0 days for continuous harvest.

Common pests for Mustard Greens 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 spring or fall. Harvest young leaves for milder flavor. Plants bolt quickly in heat so grow as a cool-season crop or provide shade.

Companion Planting

Good Companions

Avoid Planting Near

  • Strawberries

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Mustard Greens in McCulloch County, TX?

McCulloch County is in Zone 8b with an average last frost of March 17. Plan your Mustard Greens planting based on this frost date — see the calendar above for exact timing.

What planting zone is McCulloch County, TX?

McCulloch County, Texas is in USDA Hardiness Zone 8b. The average last spring frost is March 17 and first fall frost is November 16.

🌱

Your McCulloch County Garden Planner — Free

A 24-page printable planner built for McCulloch County (Zone 8b). 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 McCulloch 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.