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When to Plant Zucchini in Tulare County, CA

Zucchini is an incredibly prolific summer squash that can produce an abundance of fruit from just a few plants. It is versatile in the kitchen from grilling to baking.

Tulare County, California is in USDA Zone 9a. The average last spring frost is February 17 and the first fall frost is December 3, giving you a growing season of approximately 289 days.

At an elevation of 5,836 feet, Tulare County receives approximately 18.4 inches of rainfall annually with predominantly loam soil. Summer highs average 95ยฐF, so Zucchini may need afternoon shade and extra watering during peak heat. With low rainfall, drip irrigation is essential for growing Zucchini successfully. Mulch heavily to conserve soil moisture.

Tulare County, CA (Zone 9a) Year-round
289 days
Last Spring Frost February 17
289 growing days
First Fall Frost December 3

Tulare County Soil Profile

Soil Type

Loam

Soil pH

5.9-7.2

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (190 days to spare)
Start indoors: Dec 31 Transplant: Feb 4 🍅 Harvest: Mar 25 – May 20
Recommended (50%) ✓ Fits season (177 days to spare)
Start indoors: Jan 20 Transplant: Feb 24 🍅 Harvest: Apr 14 – Jun 9
Safe Start (90%) ✓ Fits season (151 days to spare)
Start indoors: Mar 6 Transplant: Apr 10 🍅 Harvest: May 29 – Jul 24

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
0.3″/week
You supply
0.9″/week
Watering frequency 2-3 times/week
Season total 2,272 gal / 100 sq ft
Drought risk

Water stress score is 8/10 โ€” consider drought-tolerant varieties and mulching

Zucchini needs ~1,116 GDD — county provides 6,162 GDD Excellent fit

Zucchini Planting Timeline โ€” Tulare County, CA

Zucchini Planting Calendar

Activity When Date Range
Start Indoors January 20 Jan 20 โ€“ Feb 3
Transplant Outdoors February 24 Feb 24 โ€“ Mar 10
Direct Sow February 17 Feb 17 โ€“ Mar 10
Harvest April 14 Apr 14 โ€“ Jun 9

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

Month-by-Month Timeline

MonthActivities
January Start Indoors
February Start Indoors 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€“60 days

Soil pH

6 โ€“ 7.5

USDA Zone

Zone 9a

Growing Season

289 days

Growing Tips for Tulare County

Direct sow after last frost. Harvest when fruits are 6-8 inches long for best flavor and texture. Check plants daily in summer as fruits can double in size overnight.

Companion Planting

Good Companions

Avoid Planting Near

  • Potatoes

Level Up Your Garden

Frequently Asked Questions

When should I plant Zucchini in Tulare County, CA?

Tulare County is in Zone 9a with an average last frost of February 17. Plan your Zucchini planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Tulare County, CA?

Tulare County, California is in USDA Hardiness Zone 9a. The average last spring frost is February 17 and first fall frost is December 3.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Tulare 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 Tulare County, CA. Local conditions may vary. Last updated: April 2026.