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When to Plant Radish in Alexandria City, VA

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.

Alexandria City, Virginia is in USDA Zone 7a. The average last spring frost is April 6 and the first fall frost is November 8, giving you a growing season of approximately 216 days.

At an elevation of 738 feet, Alexandria City receives approximately 45.8 inches of rainfall annually with predominantly silt loam soil. Summer highs average 91ยฐF, providing good warmth for Radish during the growing season.

Alexandria City, VA (Zone 7a) Long season
216 days
Last Spring Frost April 6
216 growing days
First Fall Frost November 8

Alexandria City Soil Profile

Soil Type

Silt Loam

Soil pH

5.8-6.8

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (162 days to spare)
Transplant: Mar 27 🍅 Harvest: Apr 24 – May 15
Recommended (50%) ✓ Fits season (167 days to spare)
Transplant: Apr 6 🍅 Harvest: May 4 – May 25
Safe Start (90%) ✓ Fits season (176 days to spare)
Transplant: Apr 28 🍅 Harvest: May 26 – Jun 16

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
0.9″/week
You supply
0.1″/week
Watering frequency Only during dry spells
Season total 210 gal / 100 sq ft
Radish needs ~520 GDD — county provides 3,942 GDD Excellent fit

Radish Planting Timeline โ€” Alexandria City, VA

Radish Planting Calendar

Activity When Date Range
Direct Sow March 23 Mar 23 โ€“ Apr 13
Fall Sowing August 30 Aug 30 โ€“ Sep 13
Harvest April 20 Apr 20 โ€“ May 11

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

216 days

Growing Tips for Alexandria City

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 Alexandria City, VA?

Alexandria City is in Zone 7a with an average last frost of April 6. Plan your Radish planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Alexandria City, VA?

Alexandria City, Virginia is in USDA Hardiness Zone 7a. The average last spring frost is April 6 and first fall frost is November 8.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Alexandria City 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 Alexandria City, VA. Local conditions may vary. Last updated: April 2026.