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When to Plant Radish in Ramsey County, ND

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.

Ramsey County, North Dakota is in USDA Zone 3b. The average last spring frost is May 13 and the first fall frost is September 24, giving you a growing season of approximately 134 days.

At an elevation of 649 feet, Ramsey County receives approximately 24.1 inches of rainfall annually with predominantly loam soil. Summer highs average 81ยฐF, so choose short-season varieties of Radish to ensure they mature before fall.

Ramsey County, ND (Zone 3b) Short season
134 days
Last Spring Frost May 13
134 growing days
First Fall Frost September 24

Ramsey County Soil Profile

Soil Type

Loam

Soil pH

6.5-7.2

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (85 days to spare)
Transplant: May 8 🍅 Harvest: Jun 5 – Jun 26
Recommended (50%) ✓ Fits season (85 days to spare)
Transplant: May 13 🍅 Harvest: Jun 10 – Jul 1
Safe Start (90%) ✓ Fits season (86 days to spare)
Transplant: May 26 🍅 Harvest: Jun 23 – Jul 14

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
0.3″/week
Watering frequency Only during dry spells
Season total 350 gal / 100 sq ft
Drought risk

Water stress score is 6/10 โ€” consider drought-tolerant varieties and mulching

Radish needs ~306 GDD — county provides 1,440 GDD Excellent fit

Radish Planting Timeline โ€” Ramsey County, ND

Radish Planting Calendar

Activity When Date Range
Direct Sow May 6 May 6 โ€“ May 27
Fall Sowing July 2 Jul 2 โ€“ Jul 16
Harvest June 3 Jun 3 โ€“ Jun 24

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

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March โ€”
April โ€”
May Direct Sow
June Harvest
July Fall Sowing
August โ€”
September โ€”
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 3b

Growing Season

134 days

Growing Tips for Ramsey 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 Ramsey County, ND?

Ramsey County is in Zone 3b with an average last frost of May 13. Plan your Radish planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Ramsey County, ND?

Ramsey County, North Dakota is in USDA Hardiness Zone 3b. The average last spring frost is May 13 and first fall frost is September 24.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Ramsey County gardeners in Zone 3b 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 Ramsey County, ND. Local conditions may vary. Last updated: April 2026.