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When to Plant Microgreens in Shelby 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.

Shelby County, Texas is in USDA Zone 8a. The average last spring frost is March 6 and the first fall frost is November 16, giving you a growing season of approximately 255 days.

At an elevation of 251 feet, Shelby County receives approximately 63.8 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 94ยฐF, 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.

Shelby County, TX (Zone 8a) Long season
255 days
Last Spring Frost March 6
255 growing days
First Fall Frost November 16

Shelby County Soil Profile

Soil Type

Sandy Loam

Soil pH

5.6-6.3

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (221 days to spare)
Start indoors: Jan 25 Transplant: Mar 1 🍅 Harvest: Mar 8 – Apr 5
Recommended (50%) ✓ Fits season (220 days to spare)
Start indoors: Jan 30 Transplant: Mar 6 🍅 Harvest: Mar 13 – Apr 10
Safe Start (90%) ✓ Fits season (210 days to spare)
Start indoors: Feb 24 Transplant: Mar 31 🍅 Harvest: Apr 7 – May 5

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
1.1″/week
You supply
0.3″/week
Watering frequency Only during dry spells
Season total 566 gal / 100 sq ft
Microgreens needs ~287 GDD — county provides 5,227 GDD Excellent fit

Microgreens Planting Timeline โ€” Shelby County, TX

Microgreens Planting Calendar

Activity When Date Range
Start Indoors January 30 Jan 30 โ€“ Feb 13
Transplant Outdoors March 6 Mar 6 โ€“ Mar 20
Direct Sow February 20 Feb 20 โ€“ Mar 13
Fall Sowing September 7 Sep 7 โ€“ Sep 21
Harvest March 13 Mar 13 โ€“ Apr 10

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

Month-by-Month Timeline

MonthActivities
January Start Indoors
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

255 days

Growing Tips for Shelby 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 Shelby County, TX?

Shelby County is in Zone 8a with an average last frost of March 6. Plan your Microgreens planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Shelby County, TX?

Shelby County, Texas is in USDA Hardiness Zone 8a. The average last spring frost is March 6 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 Shelby 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 Shelby County, TX. Local conditions may vary. Last updated: April 2026.