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When to Plant Microgreens in Henderson County, TX

Microgreens are young seedlings of vegetables and herbs harvested at the cotyledon or first true leaf stage. They pack concentrated flavors and nutrients in a tiny package.

Henderson County, Texas is in USDA Zone 8a. The average last spring frost is March 9 and the first fall frost is November 16, giving you a growing season of approximately 252 days.

At an elevation of 290 feet, Henderson County receives approximately 72.8 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 92ยฐF, providing good warmth for Microgreens during the growing season. Sandy soil warms quickly in spring โ€” great for early planting โ€” but Microgreens will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Microgreens root diseases.

Henderson County, TX (Zone 8a) Long season
252 days
Last Spring Frost March 9
252 growing days
First Fall Frost November 16

Henderson County Soil Profile

Soil Type

Sandy Loam

Soil pH

5.5-6.6

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (218 days to spare)
Start indoors: Jan 28 Transplant: Mar 4 🍅 Harvest: Mar 11 – Apr 8
Recommended (50%) ✓ Fits season (217 days to spare)
Start indoors: Feb 2 Transplant: Mar 9 🍅 Harvest: Mar 16 – Apr 13
Safe Start (90%) ✓ Fits season (216 days to spare)
Start indoors: Feb 19 Transplant: Mar 26 🍅 Harvest: Apr 2 – Apr 30

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
1.2″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Microgreens needs ~266 GDD — county provides 4,788 GDD Excellent fit

Microgreens Planting Timeline โ€” Henderson County, TX

Microgreens Planting Calendar

Activity When Date Range
Start Indoors February 2 Feb 2 โ€“ Feb 16
Transplant Outdoors March 9 Mar 9 โ€“ Mar 23
Direct Sow February 23 Feb 23 โ€“ Mar 16
Fall Sowing September 7 Sep 7 โ€“ Sep 21
Harvest March 16 Mar 16 โ€“ Apr 13

Plant 0.5" deep ยท 2" apart ยท Rows 6" apart

Month-by-Month Timeline

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

Growing Conditions

Sun

Partial Shade (3-6 hours)

Water

Moderate โ€” regular watering

Days to Maturity

7โ€“21 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 8a

Growing Season

252 days

Growing Tips for Henderson County

Sow seeds densely on shallow trays of moist growing medium. Cover until germination, then provide light. Harvest with scissors when 1-3 inches tall. Grow year-round indoors.

Frequently Asked Questions

When should I plant Microgreens in Henderson County, TX?

Henderson County is in Zone 8a with an average last frost of March 9. Plan your Microgreens planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Henderson County, TX?

Henderson County, Texas is in USDA Hardiness Zone 8a. The average last spring frost is March 9 and first fall frost is November 16.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Henderson County gardeners in Zone 8a 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 Henderson County, TX. Local conditions may vary. Last updated: April 2026.