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When to Plant Celeriac in Dorchester County, MD

Dorchester County, Maryland Zone 8a May

This month in Dorchester County, Maryland

Each item below is timed to Dorchester County, Maryland's frost dates and soil temperatures. Skip nothing, stress about nothing.

Avg. last frost April 9
Avg. first frost November 1
Soil temp (4") 68°F
Watering Low
Pest pressure Moderate
Daylight 14.1 hrs
  1. Start celeriac under lights

    You're about 25 weeks out from your last frost — the perfect window to get these germinating indoors.

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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.

Dorchester County, Maryland is in USDA Zone 8a. The average last spring frost is April 9 and the first fall frost is November 1, giving you a growing season of approximately 206 days.

At an elevation of 521 feet, Dorchester County receives approximately 44.6 inches of rainfall annually with predominantly silt loam soil. Summer highs average 94°F, providing good warmth for Celeriac during the growing season.

Dorchester County, MD (Zone 8a) Long season
206 days
Last Spring Frost April 9
206 growing days
First Fall Frost November 1

Dorchester County Soil Profile

Soil Type

Silt Loam

Soil pH

5.4-6.9

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (64 days to spare)
Start indoors: Feb 26 Transplant: Apr 2 🍅 Harvest: Jul 16 – Aug 20
Recommended (50%) ✓ Fits season (66 days to spare)
Start indoors: Mar 5 Transplant: Apr 9 🍅 Harvest: Jul 23 – Aug 27
Safe Start (90%) ✓ Fits season (79 days to spare)
Start indoors: Mar 29 Transplant: May 3 🍅 Harvest: Aug 16 – Sep 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 Dorchester County

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

Soil pH

Your soil pH (5.4–6.9) overlaps with Celeriac's range (6.0–7.0), though not a perfect match.

Soil Texture

The silt loam soil in Dorchester County is excellent for Celeriac — good drainage, moisture retention, and nutrient holding capacity.

Organic Matter

Organic matter is moderate (2.9%). Annual compost additions will help Celeriac.

How to Plant Celeriac

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

Fall planting: Sow 10 weeks before your first frost date for a fall harvest.

Plant Water Budget

Plant needs
0.9″/week
Rainfall provides
0.9″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft

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 3" 0" ❄️ Dormant
Feb 2.8" 0" ❄️ Dormant
Mar 4.2" 0" ❄️ Dormant
Apr 3.9" 3.5" 0.4" 💧 Light watering
May 3.9" 4.1" 0" ✅ Rainfall sufficient
Jun 3.9" 4.1" 0" ✅ Rainfall sufficient
Jul 3.9" 4.5" 0" ✅ Rainfall sufficient
Aug 3.9" 4.4" 0" ✅ Rainfall sufficient
Sep 3.9" 3.1" 0.8" 💧 Light watering
Oct 3.9" 3.5" 0.4" 💧 Light watering
Nov 3.9" 3.7" 0.2" 💧 Light watering
Dec 3.7" 0" ❄️ Dormant

Water needs are for active growing months only (Apr–Nov in Dorchester 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 ~2,255 GDD — county provides 4,223 GDD Excellent fit

Celeriac Planting Timeline — Dorchester County, MD

Celeriac Planting Calendar

Activity When Date Range
Start Indoors March 5 Mar 5 – Mar 19
Transplant Outdoors April 9 Apr 9 – Apr 23
Direct Sow March 26 Mar 26 – Apr 16
Harvest July 23 Jul 23 – Aug 27
Fall Sowing August 23 Aug 23 – Sep 6

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

Month-by-Month Timeline

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

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.9"/week · Natural rainfall sufficient

📅 Days to Maturity

100–120 days

🧪 Soil pH

Needs 6–7 · Your soil: acceptable

🗺️ USDA Zone

Zone 8a

📆 Growing Season

206 days in Dorchester County

Growing Tips for Celeriac in Dorchester County

Direct sow Celeriac outdoors after April 09 in Dorchester County when soil has warmed and frost danger has passed.

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 Dorchester County, MD?

Dorchester County is in Zone 8a with an average last frost of April 9. Plan your Celeriac planting based on this frost date — see the calendar above for exact timing.

What planting zone is Dorchester County, MD?

Dorchester County, Maryland is in USDA Hardiness Zone 8a. The average last spring frost is April 9 and first fall frost is November 1.

🌱

Your Dorchester County Garden Planner — Free

A 24-page printable planner built for Dorchester County (Zone 8a). 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 Dorchester County, MD. 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.