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When to Plant Brussels Sprouts in Atoka County, OK

Atoka County, Oklahoma Zone 8a May

This month in Atoka County, Oklahoma

Each item below is timed to Atoka County, Oklahoma's frost dates and soil temperatures. Skip nothing, stress about nothing.

Avg. last frost April 4
Avg. first frost November 1
Soil temp (4") 66°F
Watering Low
Pest pressure Moderate
Daylight 13.8 hrs
  1. Time to start brussels sprouts inside

    You're about 23 weeks out from your last frost — the perfect window to get these germinating indoors.

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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.

Atoka County, Oklahoma is in USDA Zone 8a. The average last spring frost is April 4 and the first fall frost is November 1, giving you a growing season of approximately 211 days.

At an elevation of 741 feet, Atoka County receives approximately 30.4 inches of rainfall annually with predominantly loam soil. Summer highs average 94°F, providing good warmth for Brussels Sprouts during the growing season.

Atoka County, OK (Zone 8a) Long season
211 days
Last Spring Frost April 4
211 growing days
First Fall Frost November 1
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Atoka County Soil Profile

Soil Type

Loam

Soil pH

6.7-7.7

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (68 days to spare)
Start indoors: Feb 19 Transplant: Mar 26 🍅 Harvest: Jun 25 – Aug 20
Recommended (50%) ✓ Fits season (64 days to spare)
Start indoors: Feb 28 Transplant: Apr 4 🍅 Harvest: Jul 4 – Aug 29
Safe Start (90%) ✓ Fits season (72 days to spare)
Start indoors: Mar 13 Transplant: Apr 17 🍅 Harvest: Jul 17 – Sep 11

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 Atoka County

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

Soil pH

Your soil pH (6.7–7.7) overlaps with Brussels Sprouts's range (6.0–7.5), though not a perfect match.

Soil Texture

The loam soil in Atoka County is excellent for Brussels Sprouts — good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

Organic matter is moderate (3.6%). Annual compost additions will help 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
0.6″/week
You supply
0.4″/week
Watering frequency 1-2 times/week
Season total 665 gal / 100 sq ft
Drought risk

Water stress score is 6/10 — 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 0.9" 0" ❄️ Dormant
Feb 1" 0" ❄️ Dormant
Mar 2" 0" ❄️ Dormant
Apr 3.9" 3.6" 0.3" 💧 Light watering
May 3.9" 4" 0" ✅ Rainfall sufficient
Jun 3.9" 4.5" 0" ✅ Rainfall sufficient
Jul 3.9" 4.5" 0" ✅ Rainfall sufficient
Aug 3.9" 3.5" 0.4" 💧 Light watering
Sep 3.9" 2.7" 1.2" 💧 Light watering
Oct 3.9" 2.1" 1.8" 💧 Light watering
Nov 3.9" 1" 2.9" 🚿 Regular watering
Dec 0.7" 0" ❄️ Dormant

Water needs are for active growing months only (Apr–Nov in Atoka 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 ~2,255 GDD — county provides 4,325 GDD Excellent fit

Brussels Sprouts Planting Timeline — Atoka County, OK

Brussels Sprouts Planting Calendar

Activity When Date Range
Start Indoors February 28 Feb 28 – Mar 14
Transplant Outdoors April 4 Apr 4 – Apr 18
Direct Sow March 21 Mar 21 – Apr 11
Harvest July 4 Jul 4 – Aug 29
Fall Sowing August 23 Aug 23 – Sep 6

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

Month-by-Month Timeline

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

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.9"/week · 1-2 times/week

📅 Days to Maturity

90–130 days

🧪 Soil pH

Needs 6–7.5 · Your soil: acceptable

🗺️ USDA Zone

Zone 8a

📆 Growing Season

211 days in Atoka County

Growing Tips for Brussels Sprouts in Atoka County

Direct sow Brussels Sprouts outdoors after April 04 in Atoka County when soil has warmed and frost danger has passed.

Summer highs in Atoka County reach 94°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 Atoka County, OK?

Atoka County is in Zone 8a with an average last frost of April 4. Plan your Brussels Sprouts planting based on this frost date — see the calendar above for exact timing.

What planting zone is Atoka County, OK?

Atoka County, Oklahoma is in USDA Hardiness Zone 8a. The average last spring frost is April 4 and first fall frost is November 1.

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Your Atoka County Garden Planner — Free

A 24-page printable planner built for Atoka 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 Atoka County, OK. 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.