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When to Plant Radish in Anne Arundel County, MD

Radishes are one of the fastest-growing vegetables, with some varieties ready in under a month. They come in round, elongated, and large winter types.

Anne Arundel County, Maryland is in USDA Zone 7a. The average last spring frost is April 3 and the first fall frost is November 3, giving you a growing season of approximately 214 days.

At an elevation of 435 feet, Anne Arundel County receives approximately 41 inches of rainfall annually with predominantly silt loam soil. Summer highs average 93ยฐF, providing good warmth for Radish during the growing season.

Anne Arundel County, MD (Zone 7a) Long season
214 days
Last Spring Frost April 3
214 growing days
First Fall Frost November 3

Anne Arundel County Soil Profile

Soil Type

Silt Loam

Soil pH

5.7-6.5

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (166 days to spare)
Transplant: Mar 29 🍅 Harvest: Apr 26 – May 17
Recommended (50%) ✓ Fits season (165 days to spare)
Transplant: Apr 3 🍅 Harvest: May 1 – May 22
Safe Start (90%) ✓ Fits season (166 days to spare)
Transplant: Apr 18 🍅 Harvest: May 16 – Jun 6

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.

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
0.8″/week
You supply
0.2″/week
Watering frequency Only during dry spells
Season total 372 gal / 100 sq ft
Radish needs ~563 GDD — county provides 4,226 GDD Excellent fit

Radish Planting Timeline โ€” Anne Arundel County, MD

Radish Planting Calendar

Activity When Date Range
Direct Sow March 20 Mar 20 โ€“ Apr 10
Fall Sowing August 25 Aug 25 โ€“ Sep 8
Harvest April 17 Apr 17 โ€“ May 8

Plant 0.5" deep ยท 2" apart ยท Rows 6" apart

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March Direct Sow
April Direct Sow Harvest
May Harvest
June โ€”
July โ€”
August Fall Sowing
September Fall Sowing
October โ€”
November โ€”
December โ€”

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

22โ€“35 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 7a

Growing Season

214 days

Growing Tips for Anne Arundel County

Direct sow every 1-2 weeks for continuous harvest. Do not transplant. Harvest spring radishes promptly to prevent them from becoming pithy and hot.

Companion Planting

Good Companions

Avoid Planting Near

  • Hyssop

Level Up Your Garden

Frequently Asked Questions

When should I plant Radish in Anne Arundel County, MD?

Anne Arundel County is in Zone 7a with an average last frost of April 3. Plan your Radish planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Anne Arundel County, MD?

Anne Arundel County, Maryland is in USDA Hardiness Zone 7a. The average last spring frost is April 3 and first fall frost is November 3.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Anne Arundel County gardeners in Zone 7a organize planting dates, track what's growing, and never miss a planting window.

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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 Anne Arundel County, MD. Local conditions may vary. Last updated: April 2026.