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When to Plant Celeriac in Volusia County, FL

Volusia County, Florida Zone 9b May

Your May gardening checklist

Your Volusia 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 February 3
Avg. first frost December 21
Soil temp (4") 79°F
Watering Low
Pest pressure High
Daylight 13.5 hrs
  1. It's harvest week for celeriac

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

Before June arrives, get these ready
  • 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.

Volusia County, Florida is in USDA Zone 9b. The average last spring frost is February 3 and the first fall frost is December 21, giving you a growing season of approximately 321 days.

At an elevation of 382 feet, Volusia County receives approximately 54.8 inches of rainfall annually with predominantly sand soil. Summer highs average 95°F, so Celeriac may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Celeriac will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Celeriac root diseases.

Volusia County, FL (Zone 9b) Year-round
321 days
Last Spring Frost February 3
321 growing days
First Fall Frost December 21

Volusia County Soil Profile

Soil Type

Sand

Soil pH

5-6.3

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (192 days to spare)
Start indoors: Dec 22 Transplant: Jan 19 🍅 Harvest: May 4 – Jun 8
Recommended (50%) ✓ Fits season (181 days to spare)
Start indoors: Jan 6 Transplant: Feb 3 🍅 Harvest: May 19 – Jun 23
Safe Start (90%) ✓ Fits season (158 days to spare)
Start indoors: Feb 3 Transplant: Mar 3 🍅 Harvest: Jun 16 – 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 Volusia County

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

Soil pH

Your soil pH (5.0–6.3) is more acidic than Celeriac prefers (6.0–7.0). Add garden lime to raise pH.

Soil Texture

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

Organic Matter

Organic matter is low (1.4%). 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
0.7″/week
You supply
0.2″/week
Watering frequency Only during dry spells
Season total 637 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 2.5" 0" ❄️ Dormant
Feb 3.9" 2.7" 1.2" 💧 Light watering
Mar 3.9" 3" 0.9" 💧 Light watering
Apr 3.9" 2.9" 1" 💧 Light watering
May 3.9" 4" 0" ✅ Rainfall sufficient
Jun 3.9" 7.5" 0" ✅ Rainfall sufficient
Jul 3.9" 8.6" 0" ✅ Rainfall sufficient
Aug 3.9" 8.4" 0" ✅ Rainfall sufficient
Sep 3.9" 6.1" 0" ✅ Rainfall sufficient
Oct 3.9" 4.8" 0" ✅ Rainfall sufficient
Nov 3.9" 2" 1.9" 💧 Light watering
Dec 3.9" 2.3" 1.6" 💧 Light watering

Water needs are for active growing months only (Feb–Dec in Volusia 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 ~2,338 GDD — county provides 6,842 GDD Excellent fit

Celeriac Planting Timeline — Volusia County, FL

Celeriac Planting Calendar

Activity When Date Range
Start Indoors January 6 Jan 6 – Jan 20
Transplant Outdoors February 3 Feb 3 – Feb 17
Direct Sow January 13 Jan 13 – Feb 3
Harvest May 19 May 19 – Jun 23
Fall Sowing October 26 Oct 26 – Nov 9

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

Month-by-Month Timeline

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

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.9"/week · Only during dry spells

📅 Days to Maturity

100–120 days

🧪 Soil pH

Needs 6–7 · Your soil: too_acidic

🗺️ USDA Zone

Zone 9b

📆 Growing Season

321 days in Volusia County

Growing Tips for Celeriac in Volusia County

Direct sow Celeriac outdoors after February 03 in Volusia County when soil has warmed and frost danger has passed.

Sandy soil in Volusia 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 Volusia County, FL?

Volusia County is in Zone 9b with an average last frost of February 3. Plan your Celeriac planting based on this frost date — see the calendar above for exact timing.

What planting zone is Volusia County, FL?

Volusia County, Florida is in USDA Hardiness Zone 9b. The average last spring frost is February 3 and first fall frost is December 21.

🌱

Your Volusia County Garden Planner — Free

A 24-page printable planner built for Volusia 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 Volusia 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.