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When to Plant Brussels Sprouts in Tom Green County, TX

Tom Green County, Texas Zone 8a May

Top priorities for Tom Green County, Texas gardeners in May

Welcome to May in Zone 8a. These are the moves that will have the biggest impact on your growing season.

Avg. last frost March 25
Avg. first frost November 12
Soil temp (4") 58°F
Watering High
Pest pressure Moderate
Daylight 13.6 hrs
Looking ahead to June
  • First harvests: brussels sprouts

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Brussels sprouts are a cold-hardy brassica that produces miniature cabbage-like heads along a tall stalk. Flavor improves after a light frost.

Tom Green County, Texas is in USDA Zone 8a. The average last spring frost is March 25 and the first fall frost is November 12, giving you a growing season of approximately 232 days.

At an elevation of 4,366 feet, Tom Green County receives approximately 52.3 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 102°F, so Brussels Sprouts may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Brussels Sprouts will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Brussels Sprouts root diseases.

Tom Green County, TX (Zone 8a) Long season
232 days
Last Spring Frost March 25
232 growing days
First Fall Frost November 12
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Tom Green County Soil Profile

Soil Type

Sandy Loam

Soil pH

7.2-8.3

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (89 days to spare)
Start indoors: Feb 5 Transplant: Mar 12 🍅 Harvest: Jun 11 – Aug 6
Recommended (50%) ✓ Fits season (85 days to spare)
Start indoors: Feb 18 Transplant: Mar 25 🍅 Harvest: Jun 24 – Aug 19
Safe Start (90%) ✓ Fits season (79 days to spare)
Start indoors: Mar 10 Transplant: Apr 14 🍅 Harvest: Jul 14 – Sep 8

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 Tom Green County

How your county's soil matches Brussels Sprouts's growing requirements.

Soil pH

Your soil pH (7.2–8.3) is more alkaline than Brussels Sprouts prefers (6.0–7.5). Add sulfur or peat moss to lower pH.

Soil Texture

Sandy soil in Tom Green County warms quickly in spring but drains fast. Brussels Sprouts will need more frequent watering and regular compost additions to retain nutrients.

Drainage

Drainage is adequate for Brussels Sprouts.

Organic Matter

Organic matter is low (0.9%). Add 2-3 inches of compost before planting Brussels Sprouts.

How to Plant Brussels Sprouts

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

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

Plant Water Budget

Plant needs
0.9″/week
Rainfall provides
1.0″/week
You supply
0.3″/week
Watering frequency Only during dry spells
Season total 553 gal / 100 sq ft
Drought risk

Water stress score is 8/10 — consider drought-tolerant varieties and mulching

Monthly Watering Guide for Brussels Sprouts

Brussels Sprouts needs approximately 0.9 inches of water per week (3.9" per month). Here's how your county's rainfall compares month by month.

Month Brussels Sprouts Needs Rainfall You Supplement Action
Jan 3" 0" ❄️ Dormant
Feb 3.1" 0" ❄️ Dormant
Mar 3.9" 3.1" 0.8" 💧 Light watering
Apr 3.9" 1.5" 2.4" 🚿 Regular watering
May 3.9" 1.3" 2.6" 🚿 Regular watering
Jun 3.9" 1.9" 2" 🚿 Regular watering
Jul 3.9" 9.5" 0" ✅ Rainfall sufficient
Aug 3.9" 10.3" 0" ✅ Rainfall sufficient
Sep 3.9" 7.4" 0" ✅ Rainfall sufficient
Oct 3.9" 4.8" 0" ✅ Rainfall sufficient
Nov 3.9" 2.7" 1.2" 💧 Light watering
Dec 3.9" 0" ❄️ Dormant

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

Brussels Sprouts 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.

Brussels Sprouts needs ~2,915 GDD — county provides 6,148 GDD Excellent fit

Brussels Sprouts Planting Timeline — Tom Green County, TX

Brussels Sprouts Planting Calendar

Activity When Date Range
Start Indoors February 18 Feb 18 – Mar 4
Transplant Outdoors March 25 Mar 25 – Apr 8
Direct Sow March 11 Mar 11 – Apr 1
Harvest June 24 Jun 24 – Aug 19
Fall Sowing September 3 Sep 3 – Sep 17

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

Month-by-Month Timeline

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

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.9"/week · Only during dry spells

📅 Days to Maturity

90–130 days

🧪 Soil pH

Needs 6–7.5 · Your soil: too_alkaline

🗺️ USDA Zone

Zone 8a

📆 Growing Season

232 days in Tom Green County

Growing Tips for Brussels Sprouts in Tom Green County

Direct sow Brussels Sprouts outdoors after March 25 in Tom Green County when soil has warmed and frost danger has passed.

Sandy soil in Tom Green County dries quickly — mulch Brussels Sprouts with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.

Summer highs in Tom Green County reach 102°F — grow Brussels Sprouts as a spring or fall crop. Use shade cloth if planting in summer.

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

General growing tips

Start seeds indoors 12-14 weeks before first fall frost. Stake tall plants to prevent toppling. Remove lower leaves as sprouts develop to improve air circulation.

Companion Planting

Good Companions

Avoid Planting Near

  • Tomatoes
  • Strawberries

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Brussels Sprouts in Tom Green County, TX?

Tom Green County is in Zone 8a with an average last frost of March 25. Plan your Brussels Sprouts planting based on this frost date — see the calendar above for exact timing.

What planting zone is Tom Green County, TX?

Tom Green County, Texas is in USDA Hardiness Zone 8a. The average last spring frost is March 25 and first fall frost is November 12.

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Your Tom Green County Garden Planner — Free

A 24-page printable planner built for Tom Green County (Zone 8a). 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 Tom Green 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.