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When to Plant Squash (Summer) in Kleberg County, TX

Summer squash includes zucchini, yellow crookneck, and pattypan varieties that are harvested young and tender. They are prolific producers in warm weather.

Kleberg County, Texas is in USDA Zone 9a. The average last spring frost is February 13 and the first fall frost is December 9, giving you a growing season of approximately 299 days.

At an elevation of 1,079 feet, Kleberg County receives approximately 64.4 inches of rainfall annually with predominantly loam soil. Summer highs average 102ยฐF, so Squash (Summer) may need afternoon shade and extra watering during peak heat. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Squash (Summer) root diseases.

Kleberg County, TX (Zone 9a) Year-round
299 days
Last Spring Frost February 13
299 growing days
First Fall Frost December 9

Kleberg County Soil Profile

Soil Type

Loam

Soil pH

6.7-7.6

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (195 days to spare)
Start indoors: Dec 23 Transplant: Jan 27 🍅 Harvest: Mar 17 – May 19
Recommended (50%) ✓ Fits season (180 days to spare)
Start indoors: Jan 16 Transplant: Feb 20 🍅 Harvest: Apr 10 – Jun 12
Safe Start (90%) ✓ Fits season (168 days to spare)
Start indoors: Feb 8 Transplant: Mar 15 🍅 Harvest: May 3 – Jul 5

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.

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
0.9″/week
You supply
0.1″/week
Watering frequency Only during dry spells
Season total 315 gal / 100 sq ft
Drought risk

Water stress score is 6/10 โ€” consider drought-tolerant varieties and mulching

Squash (Summer) needs ~1,458 GDD — county provides 7,950 GDD Excellent fit

Squash (Summer) Planting Timeline โ€” Kleberg County, TX

Squash (Summer) Planting Calendar

Activity When Date Range
Start Indoors January 16 Jan 16 โ€“ Jan 30
Transplant Outdoors February 20 Feb 20 โ€“ Mar 6
Direct Sow February 13 Feb 13 โ€“ Mar 6
Harvest April 10 Apr 10 โ€“ Jun 12

Plant 1" deep ยท 30" apart ยท Rows 42" apart

Month-by-Month Timeline

MonthActivities
January Start Indoors
February Transplant Outdoors Direct Sow
March Transplant Outdoors Direct Sow
April Harvest
May Harvest
June Harvest
July โ€”
August โ€”
September โ€”
October โ€”
November โ€”
December โ€”

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

45โ€“65 days

Soil pH

6 โ€“ 7.5

USDA Zone

Zone 9a

Growing Season

299 days

Growing Tips for Kleberg County

Direct sow after last frost on mounds. Harvest frequently when fruits are 6-8 inches for best texture. Check plants daily as they grow rapidly in summer heat.

Companion Planting

Good Companions

Avoid Planting Near

  • Potatoes

Level Up Your Garden

Frequently Asked Questions

When should I plant Squash (Summer) in Kleberg County, TX?

Kleberg County is in Zone 9a with an average last frost of February 13. Plan your Squash (Summer) planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Kleberg County, TX?

Kleberg County, Texas is in USDA Hardiness Zone 9a. The average last spring frost is February 13 and first fall frost is December 9.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Kleberg County gardeners in Zone 9a organize planting dates, track what's growing, and never miss a planting window.

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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 Kleberg County, TX. Local conditions may vary. Last updated: April 2026.