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When to Plant Celeriac in Okaloosa County, FL

Okaloosa County, Florida Zone 9a May

This month in Okaloosa County, Florida

May rewards gardeners who work with the weather, not against it. Here's how to stay in step this month in Okaloosa County, Florida.

Avg. last frost March 14
Avg. first frost November 16
Soil temp (4") 74°F
Watering Moderate
Pest pressure High
Daylight 13.6 hrs
June will be here before you know it — start on
  • First harvests: celeriac

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Celeriac is a celery relative grown for its knobby, flavorful root rather than its stalks. It has a rich celery flavor and is excellent roasted, mashed, or in soups.

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 Celeriac during the growing season. Sandy soil warms quickly in spring — great for early planting — but Celeriac 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
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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 (110 days to spare)
Start indoors: Feb 6 Transplant: Mar 6 🍅 Harvest: Jun 19 – Jul 24
Recommended (50%) ✓ Fits season (107 days to spare)
Start indoors: Feb 14 Transplant: Mar 14 🍅 Harvest: Jun 27 – Aug 1
Safe Start (90%) ✓ Fits season (106 days to spare)
Start indoors: Mar 10 Transplant: Apr 7 🍅 Harvest: Jul 21 – Aug 25

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 Celeriac's growing requirements.

Soil pH

Your soil pH (4.9–5.8) is more acidic than Celeriac 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. Celeriac will need more frequent watering and regular compost additions to retain nutrients.

Drainage

Celeriac is a heavy drinker but your soil drains very quickly. Mulch heavily and consider drip irrigation.

Organic Matter

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

How to Plant Celeriac

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

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

Plant Water Budget

Plant needs
0.9″/week
Rainfall provides
0.8″/week
You supply
0.4″/week
Watering frequency 1-2 times/week
Season total 915 gal / 100 sq ft
Drought risk

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

Monthly Watering Guide for Celeriac

Celeriac needs approximately 0.9 inches of water per week (3.9" per month). Here's how your county's rainfall compares month by month.

Month Celeriac Needs Rainfall You Supplement Action
Jan 2.1" 0" ❄️ Dormant
Feb 2.4" 0" ❄️ Dormant
Mar 3.9" 2.7" 1.2" 💧 Light watering
Apr 3.9" 2.3" 1.6" 💧 Light watering
May 3.9" 3.5" 0.4" 💧 Light watering
Jun 3.9" 6.1" 0" ✅ Rainfall sufficient
Jul 3.9" 8.5" 0" ✅ Rainfall sufficient
Aug 3.9" 6.3" 0" ✅ Rainfall sufficient
Sep 3.9" 6.4" 0" ✅ Rainfall sufficient
Oct 3.9" 4" 0" ✅ Rainfall sufficient
Nov 3.9" 2.3" 1.6" 💧 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.

Celeriac 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.

Celeriac needs ~2,090 GDD — county provides 4,693 GDD Excellent fit

Celeriac Planting Timeline — Okaloosa County, FL

Celeriac 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 June 27 Jun 27 – Aug 1
Fall Sowing September 21 Sep 21 – Oct 5

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

Month-by-Month Timeline

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

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.9"/week · 1-2 times/week

📅 Days to Maturity

100–120 days

🧪 Soil pH

Needs 6–7 · Your soil: too_acidic

🗺️ USDA Zone

Zone 9a

📆 Growing Season

247 days in Okaloosa County

Growing Tips for Celeriac in Okaloosa County

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

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

Common pests for Celeriac in this region include carrot rust fly and parsleyworm. Use row covers early in the season and inspect plants weekly.

General growing tips

Start seeds indoors 10-12 weeks before last frost. Remove side roots as they develop to encourage a single large bulb. Harvest after a light frost for best flavor.

Companion Planting

Good Companions

Avoid Planting Near

  • Carrots
  • Parsnip

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Celeriac in Okaloosa County, FL?

Okaloosa County is in Zone 9a with an average last frost of March 14. Plan your Celeriac 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

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