When to Plant Radicchio in Jackson County, OK
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.
Jackson County, Oklahoma is in USDA Zone 7b. The average last spring frost is April 5 and the first fall frost is November 4, giving you a growing season of approximately 213 days.
At an elevation of 695 feet, Jackson County receives approximately 28.7 inches of rainfall annually with predominantly loam soil. Summer highs average 92°F, providing good warmth for Radicchio during the growing season.
Jackson County Soil Profile
Soil Type
Loam
Soil pH
6.7-7.7
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 Jackson County
How your county's soil matches Radicchio's growing requirements.
Soil pH
Your soil pH (6.7–7.7) is more alkaline than Radicchio prefers (6.0–7.0). Add sulfur or peat moss to lower pH.
Soil Texture
The loam soil in Jackson County is excellent for Radicchio — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is excellent (4.2%) — Radicchio will thrive.
How to Plant Radicchio
Fall planting: Sow 10 weeks before your first frost date for a fall harvest.
Succession Planting Radicchio
Sow every 6.9 weeks. Last sowing by Aug 16 to harvest before frost.
For a dedicated fall crop, sow by Aug 26.
Plant Water Budget
Water stress score is 8/10 — consider drought-tolerant varieties and mulching
Radicchio Planting Timeline — Jackson County, OK
Radicchio Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 1 | Mar 1 – Mar 15 |
| Transplant Outdoors | April 5 | Apr 5 – Apr 19 |
| Direct Sow | March 22 | Mar 22 – Apr 12 |
| Fall Sowing | August 26 | Aug 26 – Sep 9 |
| Harvest | June 7 | Jun 7 – Jul 12 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors Direct Sow |
| April | Transplant Outdoors Direct Sow |
| May | — |
| June | Harvest |
| July | Harvest |
| August | Fall Sowing |
| September | Fall Sowing |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.7"/week · Only during dry spells
📅 Days to Maturity
60–80 days
🧪 Soil pH
Needs 6–7 · Your soil: too_alkaline
🗺️ USDA Zone
Zone 7b
📆 Growing Season
213 days in Jackson County
Growing Tips for Radicchio in Jackson County
Direct sow Radicchio outdoors after April 05 in Jackson County when soil has warmed and frost danger has passed.
Common pests for Radicchio in this region include aphids and slugs. Use row covers early in the season and inspect plants weekly.
General growing tips
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 Jackson County, OK?
Jackson County is in Zone 7b with an average last frost of April 5. Plan your Radicchio planting based on this frost date — see the calendar above for exact timing.
What planting zone is Jackson County, OK?
Jackson County, Oklahoma is in USDA Hardiness Zone 7b. The average last spring frost is April 5 and first fall frost is November 4.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Jackson County gardeners in Zone 7b organize planting dates, track what's growing, and never miss a planting window.
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