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When to Plant Microgreens in Tulare County, CA

Tulare County, California Zone 9b May

May in the garden — Tulare County, California

We've pulled the most time-sensitive tasks for Tulare County, California this May and put them front and centre. Tackle them in order.

Avg. last frost February 17
Avg. first frost December 3
Soil temp (4") 59°F
Watering Critical
Pest pressure High
Daylight 13.9 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.

Tulare County, California is in USDA Zone 9b. The average last spring frost is February 17 and the first fall frost is December 3, giving you a growing season of approximately 289 days.

At an elevation of 5,836 feet, Tulare County receives approximately 18.4 inches of rainfall annually with predominantly loam soil. Summer highs average 95°F, so Microgreens may need afternoon shade and extra watering during peak heat. With low rainfall, drip irrigation is essential for growing Microgreens successfully. Mulch heavily to conserve soil moisture.

Tulare County, CA (Zone 9b) Year-round
289 days
Last Spring Frost February 17
289 growing days
First Fall Frost December 3

Tulare County Soil Profile

Soil Type

Loam

Soil pH

5.9-7.2

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (267 days to spare)
Start indoors: Dec 31 Transplant: Jan 28 🍅 Harvest: Feb 4 – Mar 4
Recommended (50%) ✓ Fits season (254 days to spare)
Start indoors: Jan 20 Transplant: Feb 17 🍅 Harvest: Feb 24 – Mar 24
Safe Start (90%) ✓ Fits season (228 days to spare)
Start indoors: Mar 6 Transplant: Apr 3 🍅 Harvest: Apr 10 – May 8

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 Tulare County

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

Soil pH

Your soil pH (5.9–7.2) overlaps with Microgreens's range (6.0–7.0), though not a perfect match.

Soil Texture

The loam soil in Tulare County is excellent for Microgreens — good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

Organic matter is moderate (2.2%). Annual compost additions will help 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 289-day season

Sow every 0.7 weeks. Last sowing by Nov 12 to harvest before frost.

For a dedicated fall crop, sow by Oct 08.

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
0.3″/week
You supply
0.9″/week
Watering frequency 2-3 times/week
Season total 2,272 gal / 100 sq ft
Drought risk

Water stress score is 8/10 — consider drought-tolerant varieties and mulching

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 3.6" 0" ❄️ Dormant
Feb 4.3" 3.7" 0.6" 💧 Light watering
Mar 4.3" 3" 1.3" 💧 Light watering
Apr 4.3" 1.5" 2.8" 🚿 Regular watering
May 4.3" 0.5" 3.8" 🚿 Regular watering
Jun 4.3" 0.1" 4.2" 🚿 Regular watering
Jul 4.3" 0" 4.3" 🚿 Regular watering
Aug 4.3" 0" 4.3" 🚿 Regular watering
Sep 4.3" 0.2" 4.1" 🚿 Regular watering
Oct 4.3" 0.7" 3.6" 🚿 Regular watering
Nov 4.3" 1.7" 2.6" 🚿 Regular watering
Dec 4.3" 3.4" 0.9" 💧 Light watering

Water needs are for active growing months only (Feb–Dec in Tulare 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 6,162 GDD Excellent fit

Microgreens Planting Timeline — Tulare County, CA

Microgreens Planting Calendar

Activity When Date Range
Start Indoors January 20 Jan 20 – Feb 3
Transplant Outdoors February 17 Feb 17 – Mar 3
Direct Sow January 27 Jan 27 – Feb 17
Harvest February 24 Feb 24 – Mar 24
Fall Sowing October 8 Oct 8 – Oct 22

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 · 2-3 times/week

📅 Days to Maturity

7–21 days

🧪 Soil pH

Needs 6–7 · Your soil: acceptable

🗺️ USDA Zone

Zone 9b

📆 Growing Season

289 days in Tulare County

Growing Tips for Microgreens in Tulare County

Direct sow Microgreens outdoors after February 17 in Tulare County when soil has warmed and frost danger has passed.

Your generous 290.0-day season in Tulare County allows multiple plantings of Microgreens. Sow every 3.0 days for continuous harvest.

Tulare County receives only 18" of rain annually. Microgreens needs consistent moisture — install drip irrigation or water deeply 2-3 times per week.

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 Tulare County, CA?

Tulare County is in Zone 9b with an average last frost of February 17. Plan your Microgreens planting based on this frost date — see the calendar above for exact timing.

What planting zone is Tulare County, CA?

Tulare County, California is in USDA Hardiness Zone 9b. The average last spring frost is February 17 and first fall frost is December 3.

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Your Tulare County Garden Planner — Free

A 24-page printable planner built for Tulare 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 Tulare County, CA. 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.