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When to Plant Microgreens in Matagorda County, TX

Matagorda County, Texas Zone 9b May

What to do in May

Each item below is timed to Matagorda County, Texas's frost dates and soil temperatures. Skip nothing, stress about nothing.

Avg. last frost February 19
Avg. first frost December 6
Soil temp (4") 76°F
Watering Low
Pest pressure High
Daylight 13.4 hrs

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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.

Matagorda County, Texas is in USDA Zone 9b. The average last spring frost is February 19 and the first fall frost is December 6, giving you a growing season of approximately 290 days.

At an elevation of 161 feet, Matagorda County receives approximately 57.1 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 95°F, so Microgreens may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — 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.

Matagorda County, TX (Zone 9b) Year-round
290 days
Last Spring Frost February 19
290 growing days
First Fall Frost December 6

Matagorda County Soil Profile

Soil Type

Sandy Loam

Soil pH

5.4-6.5

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (260 days to spare)
Start indoors: Jan 10 Transplant: Feb 7 🍅 Harvest: Feb 14 – Mar 14
Recommended (50%) ✓ Fits season (255 days to spare)
Start indoors: Jan 22 Transplant: Feb 19 🍅 Harvest: Feb 26 – Mar 26
Safe Start (90%) ✓ Fits season (246 days to spare)
Start indoors: Feb 12 Transplant: Mar 12 🍅 Harvest: Mar 19 – Apr 16

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.

Soil Compatibility in Matagorda County

How your county's soil matches Microgreens's growing requirements.

Soil pH

Your soil pH (5.4–6.5) is more acidic than Microgreens prefers (6.0–7.0). Add garden lime to raise pH.

Soil Texture

Sandy soil in Matagorda County warms quickly in spring but drains fast. Microgreens will need more frequent watering and regular compost additions to retain nutrients.

Organic Matter

Organic matter is low (1.9%). Add 2-3 inches of compost before planting Microgreens.

How to Plant Microgreens

0.5"
Planting Depth
2"
Between Plants
6"
Between Rows

Fall planting: Sow 8 weeks before your first frost date for a fall harvest.

Succession Planting Microgreens

57
successive plantings in your 290-day season

Sow every 0.7 weeks. Last sowing by Nov 15 to harvest before frost.

For a dedicated fall crop, sow by Oct 11.

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 456 gal / 100 sq ft

Monthly Watering Guide for Microgreens

Microgreens needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.

Month Microgreens Needs Rainfall You Supplement Action
Jan 1.4" 0" ❄️ Dormant
Feb 4.3" 1.9" 2.4" 🚿 Regular watering
Mar 4.3" 3.4" 0.9" 💧 Light watering
Apr 4.3" 6.2" 0" ✅ Rainfall sufficient
May 4.3" 7.9" 0" ✅ Rainfall sufficient
Jun 4.3" 9.4" 0" ✅ Rainfall sufficient
Jul 4.3" 7.8" 0" ✅ Rainfall sufficient
Aug 4.3" 6.9" 0" ✅ Rainfall sufficient
Sep 4.3" 5.3" 0" ✅ Rainfall sufficient
Oct 4.3" 3.7" 0.6" 💧 Light watering
Nov 4.3" 1.8" 2.5" 🚿 Regular watering
Dec 4.3" 1.4" 2.9" 🚿 Regular watering

Water needs are for active growing months only (Feb–Dec in Matagorda County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.

Microgreens Heat Requirements (GDD)

What are Growing Degree Days (GDD)?

Growing Degree Days measure the total warmth your plants receive during the growing season. Think of it as a "heat bank" — every day above 50°F deposits warmth that helps your plants grow.

Each plant needs a certain amount of accumulated heat to mature. If your county provides more GDD than the plant needs, it's a great fit. If it's close, you may want to choose faster-maturing varieties or start seeds indoors to get a head start.

Microgreens needs ~298 GDD — county provides 6,183 GDD Excellent fit

Microgreens Planting Timeline — Matagorda County, TX

Microgreens Planting Calendar

Activity When Date Range
Start Indoors January 22 Jan 22 – Feb 5
Transplant Outdoors February 19 Feb 19 – Mar 5
Direct Sow January 29 Jan 29 – Feb 19
Harvest February 26 Feb 26 – Mar 26
Fall Sowing October 11 Oct 11 – Oct 25

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

Month-by-Month Timeline

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

Growing Conditions

☀️ Sun

Partial Shade (3-6 hours)

💧 Water

1"/week · Only during dry spells

📅 Days to Maturity

7–21 days

🧪 Soil pH

Needs 6–7 · Your soil: too_acidic

🗺️ USDA Zone

Zone 9b

📆 Growing Season

290 days in Matagorda County

Growing Tips for Microgreens in Matagorda County

Direct sow Microgreens outdoors after February 19 in Matagorda County when soil has warmed and frost danger has passed.

Sandy soil in Matagorda County dries quickly — mulch Microgreens with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.

Your generous 291.0-day season in Matagorda County allows multiple plantings of Microgreens. Sow every 3.0 days for continuous harvest.

General growing tips

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 Matagorda County, TX?

Matagorda County is in Zone 9b with an average last frost of February 19. Plan your Microgreens planting based on this frost date — see the calendar above for exact timing.

What planting zone is Matagorda County, TX?

Matagorda County, Texas is in USDA Hardiness Zone 9b. The average last spring frost is February 19 and first fall frost is December 6.

🌱

Your Matagorda County Garden Planner — Free

A 24-page printable planner built for Matagorda County (Zone 9b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.

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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 Matagorda County, TX. Local conditions may vary. Last updated: May 2026.

Sources & credits

Every number on this page traces back to a primary horticulture or government data source. Click through to verify.