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When to Plant Jicama in Lynn 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.

Lynn County, Texas is in USDA Zone 7b. The average last spring frost is March 31 and the first fall frost is November 9, giving you a growing season of approximately 223 days.

At an elevation of 2,252 feet, Lynn County receives approximately 47.6 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 94ยฐF, providing good warmth for Jicama during the growing season. 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.

Lynn County, TX (Zone 7b) Long season
223 days
Last Spring Frost March 31
223 growing days
First Fall Frost November 9

Lynn County Soil Profile

Soil Type

Sandy Loam

Soil pH

7.5-8.5

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (11 days to spare)
Start indoors: Feb 4 Transplant: Apr 8 🍅 Harvest: Aug 12 – Oct 21
Recommended (50%) ✓ Fits season (13 days to spare)
Start indoors: Feb 10 Transplant: Apr 14 🍅 Harvest: Aug 18 – Oct 27
Safe Start (90%) ✓ Fits season (12 days to spare)
Start indoors: Feb 25 Transplant: Apr 29 🍅 Harvest: Sep 2 – Nov 11

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 246 gal / 100 sq ft
Drought risk

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

Jicama needs ~3,075 GDD — county provides 4,571 GDD Excellent fit

Jicama Planting Timeline โ€” Lynn County, TX

Jicama Planting Calendar

Activity When Date Range
Start Indoors February 10 Feb 10 โ€“ Feb 24
Transplant Outdoors April 14 Apr 14 โ€“ Apr 28
Direct Sow April 7 Apr 7 โ€“ Apr 28
Harvest August 18 Aug 18 โ€“ Oct 27

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

Month-by-Month Timeline

MonthActivities
January โ€”
February Start Indoors
March โ€”
April Transplant Outdoors Direct Sow
May โ€”
June โ€”
July โ€”
August Harvest
September Harvest
October Harvest
November โ€”
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 7b

Growing Season

223 days

Growing Tips for Lynn 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 Lynn County, TX?

Lynn County is in Zone 7b with an average last frost of March 31. Plan your Jicama planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Lynn County, TX?

Lynn County, Texas is in USDA Hardiness Zone 7b. The average last spring frost is March 31 and first fall frost is November 9.

๐ŸŒฑ

Plan Your Garden with Confidence

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