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When to Plant Crosne in Switzerland County, IN

Crosne (Chinese artichoke) produces small, segmented white tubers with a crunchy texture and mild artichoke-nutty flavor. They are a rare delicacy in French cuisine.

Switzerland County, Indiana is in USDA Zone 6a. The average last spring frost is April 17 and the first fall frost is October 19, giving you a growing season of approximately 185 days.

At an elevation of 853 feet, Switzerland County receives approximately 36.5 inches of rainfall annually with predominantly silt loam soil. Summer highs average 90ยฐF, providing good warmth for Crosne during the growing season.

Switzerland County, IN (Zone 6a) Moderate season
185 days
Last Spring Frost April 17
185 growing days
First Fall Frost October 19

Switzerland County Soil Profile

Soil Type

Silt Loam

Soil pH

6.1-6.8

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✗ May not fit
Transplant: Apr 10 🍅 Harvest: Sep 11 – Oct 23
Recommended (50%) ✗ May not fit
Transplant: Apr 17 🍅 Harvest: Sep 18 – Oct 30
Safe Start (90%) ✗ May not fit
Transplant: May 7 🍅 Harvest: Oct 8 – Nov 19

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
0.2″/week
Watering frequency Only during dry spells
Season total 282 gal / 100 sq ft
Crosne needs ~3,062 GDD — county provides 3,237 GDD Good fit

Crosne Planting Timeline โ€” Switzerland County, IN

Crosne Planting Calendar

Activity When Date Range
Direct Sow April 3 Apr 3 โ€“ Apr 24
Fall Sowing August 10 Aug 10 โ€“ Aug 24
Harvest September 4 Sep 4 โ€“ Oct 16

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 โ€”
June โ€”
July โ€”
August Fall Sowing
September Harvest
October Harvest
November โ€”
December โ€”

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

150โ€“200 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 6a

Growing Season

185 days

Growing Tips for Switzerland County

Plant tubers 3 inches deep in spring. Mark the location well as plants die back. Harvest in late fall after frost. Leave some tubers in ground for next year. Very labor-intensive to harvest.

Companion Planting

Good Companions

Level Up Your Garden

Frequently Asked Questions

When should I plant Crosne in Switzerland County, IN?

Switzerland County is in Zone 6a with an average last frost of April 17. Plan your Crosne planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Switzerland County, IN?

Switzerland County, Indiana is in USDA Hardiness Zone 6a. The average last spring frost is April 17 and first fall frost is October 19.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Switzerland 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 Switzerland County, IN. Local conditions may vary. Last updated: April 2026.