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When to Plant Tomatillo in Indian River County, FL

Indian River County, Florida Zone 10a May

Your May gardening checklist

Your Indian River County, Florida garden is entering a new phase. Here's what's on the schedule for May and why each task matters now.

Avg. last frost January 26
Avg. first frost December 20
Soil temp (4") 78°F
Watering Moderate
Pest pressure High
Daylight 13.4 hrs
  1. Basket week: tomatillo

    The more you pick, the more the plant produces. Letting fruit overripen tells the plant it's time to stop.

Coming up in June — start thinking about
  • First harvests: tomatillo

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Tomatillos are a Mexican staple that produces tart, green fruits enclosed in papery husks. They are essential for salsa verde and green sauces.

Indian River County, Florida is in USDA Zone 10a. The average last spring frost is January 26 and the first fall frost is December 20, giving you a growing season of approximately 328 days.

At an elevation of 317 feet, Indian River County receives approximately 52.7 inches of rainfall annually with predominantly sand soil. Summer highs average 97°F, so Tomatillo may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Tomatillo will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Tomatillo root diseases.

Indian River County, FL (Zone 10a) Year-round
328 days
Last Spring Frost January 26
328 growing days
First Fall Frost December 20

Indian River County Soil Profile

Soil Type

Sand

Soil pH

5.2-6.2

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (186 days to spare)
Start indoors: Dec 8 Transplant: Jan 26 🍅 Harvest: Mar 30 – Jun 8
Recommended (50%) ✓ Fits season (188 days to spare)
Start indoors: Dec 15 Transplant: Feb 2 🍅 Harvest: Apr 6 – Jun 15
Safe Start (90%) ✓ Fits season (169 days to spare)
Start indoors: Jan 7 Transplant: Feb 25 🍅 Harvest: Apr 29 – Jul 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 Indian River County

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

Soil pH

Your soil pH (5.2–6.2) is more acidic than Tomatillo prefers (6.0–7.0). Add garden lime to raise pH.

Soil Texture

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

Organic Matter

Organic matter is low (1.5%). Add 2-3 inches of compost before planting Tomatillo.

How to Plant Tomatillo

1"
Planting Depth
15"
Between Plants
24"
Between Rows

Succession Planting Tomatillo

6
successive plantings in your 328-day season

Sow every 6.9 weeks. Last sowing by Sep 26 to harvest before frost.

Plant Water Budget

Plant needs
1.1″/week
Rainfall provides
0.7″/week
You supply
0.5″/week
Watering frequency 1-2 times/week
Season total 1,501 gal / 100 sq ft
Drought risk

Water stress score is 6/10 — consider drought-tolerant varieties and mulching

Monthly Watering Guide for Tomatillo

Tomatillo needs approximately 1.1 inches of water per week (4.8" per month). Here's how your county's rainfall compares month by month.

Month Tomatillo Needs Rainfall You Supplement Action
Jan 4.8" 2.5" 2.3" 💧 Light watering
Feb 4.8" 2.5" 2.3" 💧 Light watering
Mar 4.8" 2.8" 2" 💧 Light watering
Apr 4.8" 2.5" 2.3" 💧 Light watering
May 4.8" 3.3" 1.5" 💧 Light watering
Jun 4.8" 7.8" 0" ✅ Rainfall sufficient
Jul 4.8" 7.2" 0" ✅ Rainfall sufficient
Aug 4.8" 8.2" 0" ✅ Rainfall sufficient
Sep 4.8" 7.2" 0" ✅ Rainfall sufficient
Oct 4.8" 4.4" 0.4" 💧 Light watering
Nov 4.8" 2.3" 2.5" 🚿 Regular watering
Dec 4.8" 1.9" 2.9" 🚿 Regular watering

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

Tomatillo 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.

Tomatillo needs ~1,649 GDD — county provides 7,484 GDD Excellent fit

Tomatillo Planting Timeline — Indian River County, FL

Tomatillo Planting Calendar

Activity When Date Range
Start Indoors December 15 Dec 15 – Dec 29
Transplant Outdoors February 2 Feb 2 – Feb 16
Direct Sow January 26 Jan 26 – Feb 16
Harvest April 6 Apr 6 – Jun 15

Plant 1" deep · 15" apart · Rows 24" apart

Month-by-Month Timeline

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

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

1.1"/week · 1-2 times/week

📅 Days to Maturity

60–85 days

🧪 Soil pH

Needs 6–7 · Your soil: too_acidic

🗺️ USDA Zone

Zone 10a

📆 Growing Season

328 days in Indian River County

Growing Tips for Tomatillo in Indian River County

Direct sow Tomatillo outdoors after January 26 in Indian River County when soil has warmed and frost danger has passed.

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

With summer highs reaching 97°F in Indian River County, provide afternoon shade for Tomatillo and water deeply in the morning.

Common pests for Tomatillo in this region include tomato hornworm and aphids. Use row covers early in the season and inspect plants weekly.

General growing tips

Start seeds indoors 6-8 weeks before last frost. Plant at least two plants for cross-pollination. Harvest when fruits fill the husk and it begins to split.

Companion Planting

Good Companions

Avoid Planting Near

  • Fennel
  • Dill

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Tomatillo in Indian River County, FL?

Indian River County is in Zone 10a with an average last frost of January 26. Plan your Tomatillo planting based on this frost date — see the calendar above for exact timing.

What planting zone is Indian River County, FL?

Indian River County, Florida is in USDA Hardiness Zone 10a. The average last spring frost is January 26 and first fall frost is December 20.

🌱

Your Indian River County Garden Planner — Free

A 24-page printable planner built for Indian River County (Zone 10a). 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 Indian River County, FL. 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.