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When to Plant Salsify in Pierce County, WI

Salsify is a root vegetable with a subtle oyster-like flavor, earning it the nickname "oyster plant." It produces long, slender, cream-colored roots.

Pierce County, Wisconsin is in USDA Zone 4a. The average last spring frost is April 28 and the first fall frost is October 8, giving you a growing season of approximately 163 days.

At an elevation of 523 feet, Pierce County receives approximately 35.1 inches of rainfall annually with predominantly silt loam soil. Summer highs average 84ยฐF, so choose short-season varieties of Salsify to ensure they mature before fall.

Pierce County, WI (Zone 4a) Moderate season
163 days
Last Spring Frost April 28
163 growing days
First Fall Frost October 8

Pierce County Soil Profile

Soil Type

Silt Loam

Soil pH

5.9-6.8

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (19 days to spare)
Transplant: Apr 19 🍅 Harvest: Aug 2 – Sep 13
Recommended (50%) ✓ Fits season (16 days to spare)
Transplant: Apr 28 🍅 Harvest: Aug 11 – Sep 22
Safe Start (90%) ✓ Fits season (15 days to spare)
Transplant: May 16 🍅 Harvest: Aug 29 – Oct 10

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 166 gal / 100 sq ft
Drought risk

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

Salsify needs ~1,495 GDD — county provides 2,119 GDD Excellent fit

Salsify Planting Timeline โ€” Pierce County, WI

Salsify Planting Calendar

Activity When Date Range
Direct Sow April 21 Apr 21 โ€“ May 12
Fall Sowing July 16 Jul 16 โ€“ Jul 30
Harvest August 4 Aug 4 โ€“ Sep 15

Plant 0.5" deep ยท 6" apart ยท Rows 12" apart

Month-by-Month Timeline

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

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

100โ€“130 days

Soil pH

6 โ€“ 7.5

USDA Zone

Zone 4a

Growing Season

163 days

Growing Tips for Pierce County

Direct sow in spring in deeply worked, stone-free soil. Use fresh seed only as viability drops quickly. Harvest in late fall after frost for best flavor.

Companion Planting

Good Companions

Level Up Your Garden

Frequently Asked Questions

When should I plant Salsify in Pierce County, WI?

Pierce County is in Zone 4a with an average last frost of April 28. Plan your Salsify planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Pierce County, WI?

Pierce County, Wisconsin is in USDA Hardiness Zone 4a. The average last spring frost is April 28 and first fall frost is October 8.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Pierce County gardeners in Zone 4a 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 Pierce County, WI. Local conditions may vary. Last updated: April 2026.