When to Plant Horseradish in Marion County, OH
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.
Marion County, Ohio is in USDA Zone 5b. The average last spring frost is April 26 and the first fall frost is October 20, giving you a growing season of approximately 177 days.
At an elevation of 733 feet, Marion County receives approximately 34 inches of rainfall annually with predominantly silt loam soil. Summer highs average 87°F, providing good warmth for Horseradish during the growing season.
Marion County Soil Profile
Soil Type
Silt Loam
Soil pH
6-7.2
Drainage
Well Drained
Plant Planting Risk Windows
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
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
Horseradish Planting Timeline — Marion County, OH
Horseradish Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | May 10 | May 10 – May 24 |
| Harvest | September 13 | Sep 13 – Oct 25 |
Plant 1" deep · 30" apart · Rows 42" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | Transplant Outdoors |
| June | — |
| July | — |
| August | — |
| September | Harvest |
| October | Harvest |
| November | — |
| December | — |
Growing Conditions
Sun
Full Sun (6-8+ hours)
Water
Moderate — regular watering
Days to Maturity
120–180 days
Soil pH
6 – 7.5
USDA Zone
Zone 5b
Growing Season
177 days
Growing Tips for Marion 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
Horseradish in Other Locations
Frequently Asked Questions
When should I plant Horseradish in Marion County, OH?
Marion County is in Zone 5b with an average last frost of April 26. Plan your Horseradish planting based on this frost date — see the calendar above for exact timing.
What planting zone is Marion County, OH?
Marion County, Ohio is in USDA Hardiness Zone 5b. The average last spring frost is April 26 and first fall frost is October 20.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Marion County gardeners in Zone 5b organize planting dates, track what's growing, and never miss a planting window.
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