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When to Plant Celtuce in Okaloosa County, FL

Okaloosa County, Florida Zone 9a May

Your May game plan for Okaloosa County, Florida

May is a pivotal month for Okaloosa County, Florida gardens. Focus on these tasks first and you'll set up the rest of the season for success.

Avg. last frost March 14
Avg. first frost November 16
Soil temp (4") 74°F
Watering Moderate
Pest pressure High
Daylight 13.6 hrs
  1. Pick celtuce

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

To set up a strong June, finish these tasks
  • First harvests: celtuce

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Celtuce (stem lettuce) is a Chinese vegetable grown for its thick, crunchy stem rather than its leaves. The peeled stem has a mild, cucumber-like flavor.

Okaloosa County, Florida is in USDA Zone 9a. The average last spring frost is March 14 and the first fall frost is November 16, giving you a growing season of approximately 247 days.

At an elevation of 396 feet, Okaloosa County receives approximately 48.4 inches of rainfall annually with predominantly sand soil. Summer highs average 92°F, providing good warmth for Celtuce during the growing season. Sandy soil warms quickly in spring — great for early planting — but Celtuce will need more frequent watering and organic matter to retain nutrients.

Okaloosa County, FL (Zone 9a) Long season
247 days
Last Spring Frost March 14
247 growing days
First Fall Frost November 16

Okaloosa County Soil Profile

Soil Type

Sand

Soil pH

4.9-5.8

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (145 days to spare)
Start indoors: Feb 6 Transplant: Mar 6 🍅 Harvest: May 8 – Jun 19
Recommended (50%) ✓ Fits season (142 days to spare)
Start indoors: Feb 14 Transplant: Mar 14 🍅 Harvest: May 16 – Jun 27
Safe Start (90%) ✓ Fits season (141 days to spare)
Start indoors: Mar 10 Transplant: Apr 7 🍅 Harvest: Jun 9 – Jul 21

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 Okaloosa County

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

Soil pH

Your soil pH (4.9–5.8) is more acidic than Celtuce prefers (6.0–7.0). Add garden lime to raise pH.

Soil Texture

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

Drainage

Drainage is adequate for Celtuce.

Organic Matter

Organic matter is low (1.6%). Add 2-3 inches of compost before planting Celtuce.

How to Plant Celtuce

0.5"
Planting Depth
6"
Between Plants
12"
Between Rows

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

Succession Planting Celtuce

4
successive plantings in your 247-day season

Sow every 6.9 weeks. Last sowing by Aug 18 to harvest before frost.

For a dedicated fall crop, sow by Sep 21.

Plant Water Budget

Plant needs
0.7″/week
Rainfall provides
0.8″/week
You supply
0.1″/week
Watering frequency Only during dry spells
Season total 230 gal / 100 sq ft
Drought risk

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

Monthly Watering Guide for Celtuce

Celtuce needs approximately 0.7 inches of water per week (3" per month). Here's how your county's rainfall compares month by month.

Month Celtuce Needs Rainfall You Supplement Action
Jan 2.1" 0" ❄️ Dormant
Feb 2.4" 0" ❄️ Dormant
Mar 3" 2.7" 0.3" 💧 Light watering
Apr 3" 2.3" 0.7" 💧 Light watering
May 3" 3.5" 0" ✅ Rainfall sufficient
Jun 3" 6.1" 0" ✅ Rainfall sufficient
Jul 3" 8.5" 0" ✅ Rainfall sufficient
Aug 3" 6.3" 0" ✅ Rainfall sufficient
Sep 3" 6.4" 0" ✅ Rainfall sufficient
Oct 3" 4" 0" ✅ Rainfall sufficient
Nov 3" 2.3" 0.7" 💧 Light watering
Dec 1.8" 0" ❄️ Dormant

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

Celtuce 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.

Celtuce needs ~1,425 GDD — county provides 4,693 GDD Excellent fit

Celtuce Planting Timeline — Okaloosa County, FL

Celtuce Planting Calendar

Activity When Date Range
Start Indoors February 14 Feb 14 – Feb 28
Transplant Outdoors March 14 Mar 14 – Mar 28
Direct Sow February 21 Feb 21 – Mar 14
Harvest May 16 May 16 – Jun 27
Fall Sowing September 21 Sep 21 – Oct 5

Plant 0.5" deep · 6" apart · Rows 12" apart

Month-by-Month Timeline

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

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.7"/week · Only during dry spells

📅 Days to Maturity

60–90 days

🧪 Soil pH

Needs 6–7 · Your soil: too_acidic

🗺️ USDA Zone

Zone 9a

📆 Growing Season

247 days in Okaloosa County

Growing Tips for Celtuce in Okaloosa County

Direct sow Celtuce outdoors after March 14 in Okaloosa County when soil has warmed and frost danger has passed.

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

Common pests for Celtuce in this region include aphids and slugs. Use row covers early in the season and inspect plants weekly.

General growing tips

Direct sow in spring or start indoors. Space 12 inches apart. Harvest when stems are about 1 inch in diameter. Peel the tough outer skin to reveal the tender center.

Companion Planting

Good Companions

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Celtuce in Okaloosa County, FL?

Okaloosa County is in Zone 9a with an average last frost of March 14. Plan your Celtuce planting based on this frost date — see the calendar above for exact timing.

What planting zone is Okaloosa County, FL?

Okaloosa County, Florida is in USDA Hardiness Zone 9a. The average last spring frost is March 14 and first fall frost is November 16.

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Your Okaloosa County Garden Planner — Free

A 24-page printable planner built for Okaloosa County (Zone 9a). 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 Okaloosa 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.