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When to Plant Green Beans in San Patricio County, TX

San Patricio County, Texas Zone 9b May

San Patricio County, Texas gardeners: here's your May plan

May is a pivotal month for San Patricio County, Texas gardens. Focus on these tasks first and you'll set up the rest of the season for success.

Avg. last frost February 12
Avg. first frost December 9
Soil temp (4") 73°F
Watering Low
Pest pressure High
Daylight 13.4 hrs
  1. Bring in the green beans

    Morning harvests are best — cooler temperatures mean crisper produce and longer fridge life.

Coming up in June — start thinking about
  • First harvests: green beans

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Green beans are a warm-season staple available as bush or pole types. Bush beans produce a concentrated harvest while pole beans provide a longer picking season.

San Patricio County, Texas is in USDA Zone 9b. The average last spring frost is February 12 and the first fall frost is December 9, giving you a growing season of approximately 300 days.

At an elevation of 2,449 feet, San Patricio County receives approximately 54.7 inches of rainfall annually with predominantly loam soil. Summer highs average 100°F, so Green Beans may need afternoon shade and extra watering during peak heat. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Green Beans root diseases.

San Patricio County, TX (Zone 9b) Year-round
300 days
Last Spring Frost February 12
300 growing days
First Fall Frost December 9
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San Patricio County Soil Profile

Soil Type

Loam

Soil pH

6.8-7.2

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (203 days to spare)
Transplant: Jan 20 🍅 Harvest: Mar 17 – May 12
Recommended (50%) ✓ Fits season (188 days to spare)
Transplant: Feb 12 🍅 Harvest: Apr 9 – Jun 4
Safe Start (90%) ✓ Fits season (175 days to spare)
Transplant: Mar 10 🍅 Harvest: May 5 – Jun 30

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 San Patricio County

How your county's soil matches Green Beans's growing requirements.

Soil pH

Your soil pH (6.8–7.2) overlaps with Green Beans's range (6.0–7.0), though not a perfect match.

Soil Texture

The loam soil in San Patricio County is excellent for Green Beans — good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

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

How to Plant Green Beans

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

Succession Planting Green Beans

7
successive plantings in your 300-day season

Sow every 5.7 weeks. Last sowing by Oct 05 to harvest before frost.

Plant Water Budget

Plant needs
0.9″/week
Rainfall provides
0.8″/week
You supply
0.1″/week
Watering frequency Only during dry spells
Season total 366 gal / 100 sq ft

Monthly Watering Guide for Green Beans

Green Beans 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 Green Beans Needs Rainfall You Supplement Action
Jan 1.5" 0" ❄️ Dormant
Feb 3.9" 1.7" 2.2" 🚿 Regular watering
Mar 3.9" 3.8" 0.1" 💧 Light watering
Apr 3.9" 6.4" 0" ✅ Rainfall sufficient
May 3.9" 8.5" 0" ✅ Rainfall sufficient
Jun 3.9" 8.1" 0" ✅ Rainfall sufficient
Jul 3.9" 7.5" 0" ✅ Rainfall sufficient
Aug 3.9" 5.6" 0" ✅ Rainfall sufficient
Sep 3.9" 5" 0" ✅ Rainfall sufficient
Oct 3.9" 3.1" 0.8" 💧 Light watering
Nov 3.9" 2" 1.9" 💧 Light watering
Dec 3.9" 1.4" 2.5" 🚿 Regular watering

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

Green Beans 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.

Green Beans needs ~1,438 GDD — county provides 7,525 GDD Excellent fit

Green Beans Planting Timeline — San Patricio County, TX

Green Beans Planting Calendar

Activity When Date Range
Direct Sow February 19 Feb 19 – Mar 12
Harvest April 16 Apr 16 – Jun 11

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

Month-by-Month Timeline

MonthActivities
January
February Direct Sow
March Direct Sow
April Harvest
May Harvest
June Harvest
July
August
September
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

50–65 days

🧪 Soil pH

Needs 6–7 · Your soil: acceptable

🗺️ USDA Zone

Zone 9b

📆 Growing Season

300 days in San Patricio County

Growing Tips for Green Beans in San Patricio County

Direct sow Green Beans outdoors after February 12 in San Patricio County when soil has warmed and frost danger has passed.

With summer highs reaching 100°F in San Patricio County, provide afternoon shade for Green Beans and water deeply in the morning.

Common pests for Green Beans in this region include bean beetles and aphids. Use row covers early in the season and inspect plants weekly.

General growing tips

Direct sow after last frost when soil is warm. Provide sturdy supports for pole varieties. Pick beans regularly when young and tender to encourage continued production.

Companion Planting

Good Companions

Avoid Planting Near

  • Onion
  • Garlic
  • Fennel

Check more plant combinations with our Companion Planting Checker →

🌾 Save Your Own Green Beans Seeds
Life Cycle Annual
Pollination Self-Pollinating
How to Collect Allow pods to dry fully on vine until they rattle.
Storage Store airtight; viable 4 years at 35°F, under 45% humidity.

Avoid harvesting during damp weather. Isolate 25 ft between varieties.

Frequently Asked Questions

When should I plant Green Beans in San Patricio County, TX?

San Patricio County is in Zone 9b with an average last frost of February 12. Plan your Green Beans planting based on this frost date — see the calendar above for exact timing.

What planting zone is San Patricio County, TX?

San Patricio County, Texas is in USDA Hardiness Zone 9b. The average last spring frost is February 12 and first fall frost is December 9.

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Your San Patricio County Garden Planner — Free

A 24-page printable planner built for San Patricio County (Zone 9b). 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 San Patricio 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.