When to Plant Crosne in Grant County, OR
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.
Grant County, Oregon is in USDA Zone 5b. The average last spring frost is June 6 and the first fall frost is September 10, giving you a growing season of approximately 96 days.
At an elevation of 2,838 feet, Grant County receives approximately 22.6 inches of rainfall annually with predominantly silt loam soil. Summer highs average 83°F, so choose short-season varieties of Crosne to ensure they mature before fall.
Grant County Soil Profile
Soil Type
Silt Loam
Soil pH
5.4-6.4
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.
Soil Compatibility in Grant County
How your county's soil matches Crosne's growing requirements.
Soil pH
Your soil pH (5.4–6.4) is more acidic than Crosne prefers (6.0–7.0). Add garden lime to raise pH.
Soil Texture
The silt loam soil in Grant County is excellent for Crosne — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Drainage is adequate for Crosne.
Organic Matter
Organic matter is excellent (4.8%) — Crosne will thrive.
How to Plant Crosne
Fall planting: Sow 10 weeks before your first frost date for a fall harvest.
Plant Water Budget
Crosne Planting Timeline — Grant County, OR
Crosne Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Direct Sow | May 23 | May 23 – Jun 13 |
| Fall Sowing | July 2 | Jul 2 – Jul 16 |
| Harvest | October 24 | Oct 24 – Nov 7 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | Direct Sow |
| June | Direct Sow |
| July | Fall Sowing |
| August | — |
| September | — |
| October | Harvest |
| November | Harvest |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1"/week · 1-2 times/week
📅 Days to Maturity
150–200 days
🧪 Soil pH
Needs 6–7 · Your soil: too_acidic
🗺️ USDA Zone
Zone 5b
📆 Growing Season
96 days in Grant County
Growing Tips for Crosne in Grant County
Direct sow Crosne outdoors after June 06 in Grant County when soil has warmed and frost danger has passed.
Your 96.0-day growing season in Grant County is tight for Crosne (150.0-200.0 days to maturity). Start indoors and choose early-maturing varieties.
Grant County receives only 23" of rain annually. Crosne needs consistent moisture — install drip irrigation or water deeply 2-3 times per week.
General growing tips
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
Crosne in Other Locations
Frequently Asked Questions
When should I plant Crosne in Grant County, OR?
Grant County is in Zone 5b with an average last frost of June 6. Plan your Crosne planting based on this frost date — see the calendar above for exact timing.
What planting zone is Grant County, OR?
Grant County, Oregon is in USDA Hardiness Zone 5b. The average last spring frost is June 6 and first fall frost is September 10.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Grant County gardeners in Zone 5b organize planting dates, track what's growing, and never miss a planting window.
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