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When to Plant Horseradish in Phelps County, NE

Horseradish is a vigorous perennial grown for its pungent, spicy roots used as a condiment. Once established, it can be difficult to eradicate, so choose its location carefully.

Phelps County, Nebraska is in USDA Zone 5a. The average last spring frost is May 2 and the first fall frost is October 6, giving you a growing season of approximately 157 days.

At an elevation of 983 feet, Phelps County receives approximately 24.9 inches of rainfall annually with predominantly loam soil. Summer highs average 84ยฐF, so choose short-season varieties of Horseradish to ensure they mature before fall.

Phelps County, NE (Zone 5a) Moderate season
157 days
Last Spring Frost May 2
157 growing days
First Fall Frost October 6

Phelps County Soil Profile

Soil Type

Loam

Soil pH

6.8-7.2

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✗ May not fit
Transplant: May 10 🍅 Harvest: Sep 13 – Oct 25
Recommended (50%) ✗ May not fit
Transplant: May 16 🍅 Harvest: Sep 19 – Oct 31
Safe Start (90%) ✗ May not fit
Transplant: May 28 🍅 Harvest: Oct 1 – Nov 12

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
0.7″/week
You supply
0.4″/week
Watering frequency 1-2 times/week
Season total 560 gal / 100 sq ft
Drought risk

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

Horseradish needs ~1,950 GDD — county provides 2,041 GDD Good fit

Horseradish Planting Timeline โ€” Phelps County, NE

Horseradish Planting Calendar

Activity When Date Range
Transplant Outdoors May 16 May 16 โ€“ May 30
Harvest September 19 Sep 19 โ€“ Oct 31

Plant 1" deep ยท 30" apart ยท Rows 42" apart

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March โ€”
April โ€”
May Transplant Outdoors
June โ€”
July โ€”
August โ€”
September Harvest
October Harvest
November โ€”
December โ€”

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

120โ€“180 days

Soil pH

6 โ€“ 7.5

USDA Zone

Zone 5a

Growing Season

157 days

Growing Tips for Phelps County

Plant root cuttings at a 45-degree angle in early spring. Harvest roots in late fall for strongest flavor. Contain the plant with barriers or grow in large containers.

Companion Planting

Good Companions

Level Up Your Garden

Frequently Asked Questions

When should I plant Horseradish in Phelps County, NE?

Phelps County is in Zone 5a with an average last frost of May 2. Plan your Horseradish planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Phelps County, NE?

Phelps County, Nebraska is in USDA Hardiness Zone 5a. The average last spring frost is May 2 and first fall frost is October 6.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Phelps County gardeners in Zone 5a 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 Phelps County, NE. Local conditions may vary. Last updated: April 2026.