Blog

When to Plant Shallot in Zapata County, TX

Shallots are a gourmet allium prized for their complex, sweet, and mild flavor. Each bulb multiplies into a cluster, making them easy and rewarding to grow.

Zapata County, Texas is in USDA Zone 9a. The average last spring frost is February 3 and the first fall frost is December 14, giving you a growing season of approximately 314 days.

At an elevation of 3,340 feet, Zapata County receives approximately 60.6 inches of rainfall annually with predominantly loam soil. Summer highs average 103ยฐF, so Shallot may need afternoon shade and extra watering during peak heat. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Shallot root diseases.

Zapata County, TX (Zone 9a) Year-round
314 days
Last Spring Frost February 3
314 growing days
First Fall Frost December 14

Zapata County Soil Profile

Soil Type

Loam

Soil pH

6.2-7.6

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (183 days to spare)
Start indoors: Dec 20 Transplant: Jan 17 🍅 Harvest: Apr 18 – Jun 6
Recommended (50%) ✓ Fits season (174 days to spare)
Start indoors: Jan 6 Transplant: Feb 3 🍅 Harvest: May 5 – Jun 23
Safe Start (90%) ✓ Fits season (160 days to spare)
Start indoors: Jan 30 Transplant: Feb 27 🍅 Harvest: May 29 – Jul 17

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
0.8″/week
You supply
0.2″/week
Watering frequency Only during dry spells
Season total 538 gal / 100 sq ft
Shallot needs ~2,861 GDD — county provides 8,583 GDD Excellent fit

Shallot Planting Timeline โ€” Zapata County, TX

Shallot Planting Calendar

Activity When Date Range
Start Indoors January 6 Jan 6 โ€“ Jan 20
Transplant Outdoors February 3 Feb 3 โ€“ Feb 17
Direct Sow January 13 Jan 13 โ€“ Feb 3
Fall Sowing October 19 Oct 19 โ€“ Nov 2
Harvest May 5 May 5 โ€“ Jun 23

Plant 1" deep ยท 6" apart ยท Rows 12" apart

Month-by-Month Timeline

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

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

90โ€“120 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 9a

Growing Season

314 days

Growing Tips for Zapata County

Plant sets in fall for spring harvest or early spring for summer harvest. Mulch heavily if overwintering. Harvest when tops brown and dry, then cure for storage.

Companion Planting

Good Companions

Avoid Planting Near

  • Peas
  • Green Beans

Level Up Your Garden

Frequently Asked Questions

When should I plant Shallot in Zapata County, TX?

Zapata County is in Zone 9a with an average last frost of February 3. Plan your Shallot planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Zapata County, TX?

Zapata County, Texas is in USDA Hardiness Zone 9a. The average last spring frost is February 3 and first fall frost is December 14.

๐ŸŒฑ

Plan Your Garden with Confidence

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

Get Your Free Garden Planner →

Free download. Plan your entire garden season in minutes.

Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Zapata County, TX. Local conditions may vary. Last updated: April 2026.