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When to plant Celeriac in Bodega, CA

Bodega's climate puts the Celeriac spring window between February 5 and February 26. aim for a steady week of warm soil before planting. A second sowing from October 1 to October 15 extends the harvest into fall.

When to Plant Celeriac in Bodega, CA

Sonoma County, California Zone 9b June

This month in Sonoma County, California

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

Avg. last frost February 26
Avg. first frost November 26
Soil temp (4") 84°F
Watering Critical
Pest pressure High
Daylight 14.7 hrs
  1. Collect celeriac at their peak

    Don't tug. Use scissors or pruners for clean cuts — torn stems invite disease.

July 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.

Bodega, California is in USDA Zone 9b. The average last spring frost is February 26 and the first fall frost is November 26, giving you a growing season of approximately 273 days.

At an elevation of 91 feet, Sonoma County receives approximately 31.1 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 90°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.

Bodega, CA (Zone 9b) Year-round
273 days
Last Spring Frost February 26
273 growing days
First Fall Frost November 26

Bodega Soil Profile

Soil Type

Sandy Loam

Soil pH

5.9-7

Drainage

Well Drained

Celeriac Planting Risk Windows

Early Start (70% safe) ✓ Fits season (145 days to spare)
Start indoors: Jan 13 Transplant: Feb 10 🍅 Harvest: May 26 – Jun 30
Recommended (50%) ✓ Fits season (133 days to spare)
Start indoors: Jan 29 Transplant: Feb 26 🍅 Harvest: Jun 11 – Jul 16
Safe Start (90%) ✓ Fits season (119 days to spare)
Start indoors: Mar 5 Transplant: Apr 2 🍅 Harvest: Jul 16 – Aug 20

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 Bodega

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

Soil pH

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

Soil Texture

Sandy soil in Sonoma 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 moderate (2.5%). Annual compost additions will help 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.

Celeriac Water Budget

Plant needs
0.9″/week
Rainfall provides
0.5″/week
You supply
0.8″/week
Watering frequency 2-3 times/week
Season total 2,029 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 6.2" 0" ❄️ Dormant
Feb 3.9" 6.8" 0" ✅ Rainfall sufficient
Mar 3.9" 5.2" 0" ✅ Rainfall sufficient
Apr 3.9" 2.3" 1.6" 💧 Light watering
May 3.9" 0.8" 3.1" 🚿 Regular watering
Jun 3.9" 0.1" 3.8" 🚿 Regular watering
Jul 3.9" 0" 3.9" 🚿 Regular watering
Aug 3.9" 0" 3.9" 🚿 Regular watering
Sep 3.9" 0.4" 3.5" 🚿 Regular watering
Oct 3.9" 1.3" 2.6" 🚿 Regular watering
Nov 3.9" 2.7" 1.2" 💧 Light watering
Dec 5.2" 0" ❄️ Dormant

Water needs are for active growing months only (Feb–Nov in Sonoma 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 ~1,925 GDD — county provides 4,795 GDD Excellent fit

Celeriac Planting Timeline — Bodega, CA

Celeriac Planting Calendar

Activity When Date Range
Start Indoors January 29 Jan 29 – Feb 12
Transplant Outdoors February 26 Feb 26 – Mar 12
Direct Sow February 5 Feb 5 – Feb 26
Harvest June 11 Jun 11 – Jul 16
Fall Sowing October 1 Oct 1 – Oct 15

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

Month-by-Month Timeline

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

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.9"/week · 2-3 times/week

📅 Days to Maturity

100–120 days

🧪 Soil pH

Needs 6–7 · Your soil: acceptable

🗺️ USDA Zone

Zone 9b

📆 Growing Season

273 days in Sonoma County

Growing Tips for Celeriac in Bodega

Direct sow Celeriac outdoors after February 26 in Sonoma County when soil has warmed and frost danger has passed.

Sandy soil in Sonoma 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 →

When should I plant Celeriac in Bodega, CA?

In Bodega, CA, plant Celeriac after the last frost (around February 26) and before the first frost (around November 26). Best results when soil holds above 50°F.

What growing zone is Bodega, CA for Celeriac?

Bodega sits in USDA Zone 9b. Celeriac grows reliably in zones 3a through 9b, so it's a good fit here.

Can Celeriac grow in Bodega's climate?

Yes — Celeriac grows well in Bodega's temperate climate. Bodega averages a 274-day frost-free season, with last frost around February 26 and first frost around November 26.

🌱

Your Sonoma County Garden Planner — Free

A 22-page printable planner built for Sonoma 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 Sonoma County, CA. Local conditions may vary. Last updated: June 2026.