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When to Plant Jicama in Briscoe County, TX

Jicama is a tropical legume grown for its crisp, sweet, starchy root. It requires a very long, warm growing season but produces a refreshing, water chestnut-like tuber.

Briscoe County, Texas is in USDA Zone 7a. The average last spring frost is April 6 and the first fall frost is November 2, giving you a growing season of approximately 210 days.

At an elevation of 4,513 feet, Briscoe County receives approximately 47.4 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 98ยฐF, so Jicama may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring โ€” great for early planting โ€” but Jicama will need more frequent watering and organic matter to retain nutrients.

Briscoe County, TX (Zone 7a) Long season
210 days
Last Spring Frost April 6
210 growing days
First Fall Frost November 2

Briscoe County Soil Profile

Soil Type

Sandy Loam

Soil pH

7.4-8.3

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (5 days to spare)
Start indoors: Feb 5 Transplant: Apr 9 🍅 Harvest: Aug 13 – Oct 22
Recommended (50%) ✓ Fits season (0 days to spare)
Start indoors: Feb 16 Transplant: Apr 20 🍅 Harvest: Aug 24 – Nov 2
Safe Start (90%) ✓ Fits season (7 days to spare)
Start indoors: Feb 26 Transplant: Apr 30 🍅 Harvest: Sep 3 – Nov 12

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
1.0″/week
You supply
0.1″/week
Watering frequency Only during dry spells
Season total 117 gal / 100 sq ft
Drought risk

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

Jicama needs ~3,525 GDD — county provides 4,935 GDD Excellent fit

Jicama Planting Timeline โ€” Briscoe County, TX

Jicama Planting Calendar

Activity When Date Range
Start Indoors February 16 Feb 16 โ€“ Mar 2
Transplant Outdoors April 20 Apr 20 โ€“ May 4
Direct Sow April 13 Apr 13 โ€“ May 4
Harvest August 24 Aug 24 โ€“ Nov 2

Plant 0.5" deep ยท 6" apart ยท Rows 12" apart

Month-by-Month Timeline

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

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

120โ€“180 days

Soil pH

6 โ€“ 7.5

USDA Zone

Zone 7a

Growing Season

210 days

Growing Tips for Briscoe County

Start seeds indoors 8-10 weeks before last frost. Pinch off flowers to direct energy to root development. Harvest before first frost when roots are 3-6 inches across.

Companion Planting

Good Companions

Avoid Planting Near

  • Fennel

Level Up Your Garden

Frequently Asked Questions

When should I plant Jicama in Briscoe County, TX?

Briscoe County is in Zone 7a with an average last frost of April 6. Plan your Jicama planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Briscoe County, TX?

Briscoe County, Texas is in USDA Hardiness Zone 7a. The average last spring frost is April 6 and first fall frost is November 2.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Briscoe County gardeners in Zone 7a 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 Briscoe County, TX. Local conditions may vary. Last updated: April 2026.