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When to Plant Salsify in Mifflin County, PA

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

Mifflin County, Pennsylvania is in USDA Zone 6a. The average last spring frost is April 24 and the first fall frost is October 22, giving you a growing season of approximately 181 days.

At an elevation of 1,022 feet, Mifflin County receives approximately 45.7 inches of rainfall annually with predominantly silt loam soil. Summer highs average 87ยฐF, providing good warmth for Salsify during the growing season.

Mifflin County, PA (Zone 6a) Moderate season
181 days
Last Spring Frost April 24
181 growing days
First Fall Frost October 22

Mifflin County Soil Profile

Soil Type

Silt Loam

Soil pH

4.9-6.4

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (37 days to spare)
Transplant: Apr 17 🍅 Harvest: Jul 31 – Sep 11
Recommended (50%) ✓ Fits season (34 days to spare)
Transplant: Apr 24 🍅 Harvest: Aug 7 – Sep 18
Safe Start (90%) ✓ Fits season (26 days to spare)
Transplant: May 13 🍅 Harvest: Aug 26 – Oct 7

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
1.1″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Salsify needs ~1,754 GDD — county provides 2,760 GDD Excellent fit

Salsify Planting Timeline โ€” Mifflin County, PA

Salsify Planting Calendar

Activity When Date Range
Direct Sow April 10 Apr 10 โ€“ May 1
Fall Sowing August 13 Aug 13 โ€“ Aug 27
Harvest July 24 Jul 24 โ€“ Sep 4

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 Harvest
August Fall Sowing 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 6a

Growing Season

181 days

Growing Tips for Mifflin 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 Mifflin County, PA?

Mifflin County is in Zone 6a with an average last frost of April 24. Plan your Salsify planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Mifflin County, PA?

Mifflin County, Pennsylvania is in USDA Hardiness Zone 6a. The average last spring frost is April 24 and first fall frost is October 22.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Mifflin County gardeners in Zone 6a 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 Mifflin County, PA. Local conditions may vary. Last updated: April 2026.