When to Plant Radicchio in Washington County, ME
Radicchio is an Italian chicory with stunning red and white leaves and a pleasantly bitter flavor. It forms tight heads and is used in salads, grilled, or braised.
Washington County, Maine is in USDA Zone 4b. The average last spring frost is May 9 and the first fall frost is October 7, giving you a growing season of approximately 151 days.
At an elevation of 1,184 feet, Washington County receives approximately 43.9 inches of rainfall annually with predominantly silt loam soil. Summer highs average 80°F, so choose short-season varieties of Radicchio to ensure they mature before fall.
Washington County Soil Profile
Soil Type
Silt Loam
Soil pH
5-6.5
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
Radicchio Planting Timeline — Washington County, ME
Radicchio Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 28 | Mar 28 – Apr 11 |
| Transplant Outdoors | May 9 | May 9 – May 23 |
| Direct Sow | May 2 | May 2 – May 23 |
| Fall Sowing | July 15 | Jul 15 – Jul 29 |
| Harvest | July 11 | Jul 11 – Aug 15 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors |
| April | Start Indoors |
| May | Transplant Outdoors Direct Sow |
| June | — |
| July | Fall Sowing Harvest |
| August | Harvest |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
Sun
Full Sun (6-8+ hours)
Water
Moderate — regular watering
Days to Maturity
60–80 days
Soil pH
6 – 7
USDA Zone
Zone 4b
Growing Season
151 days
Growing Tips for Washington County
Start in late summer for fall harvest. The red color develops with cool nights and light frost. Harvest when heads are firm and compact.
Companion Planting
Good Companions
Avoid Planting Near
Level Up Your Garden
Radicchio in Other Locations
Frequently Asked Questions
When should I plant Radicchio in Washington County, ME?
Washington County is in Zone 4b with an average last frost of May 9. Plan your Radicchio planting based on this frost date — see the calendar above for exact timing.
What planting zone is Washington County, ME?
Washington County, Maine is in USDA Hardiness Zone 4b. The average last spring frost is May 9 and first fall frost is October 7.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Washington County gardeners in Zone 4b organize planting dates, track what's growing, and never miss a planting window.
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