When to Plant Radicchio in Calhoun County, AR
Top priorities for Calhoun County, Arkansas gardeners in May
May rewards gardeners who work with the weather, not against it. Here's how to stay in step this month in Calhoun County, Arkansas.
-
Collect radicchio at their peak
Check every 1–2 days. Many of these get tough or go to seed if you wait too long.
June will be here before you know it — start on
- First harvests: radicchio
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.
Calhoun County, Arkansas is in USDA Zone 8a. The average last spring frost is March 22 and the first fall frost is November 4, giving you a growing season of approximately 227 days.
At an elevation of 1,246 feet, Calhoun County receives approximately 52.9 inches of rainfall annually with predominantly silt loam soil. Summer highs average 94°F, providing good warmth for Radicchio during the growing season. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Radicchio root diseases.
Calhoun County Soil Profile
Soil Type
Silt Loam
Soil pH
5.3-6.9
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 Calhoun County
How your county's soil matches Radicchio's growing requirements.
Soil pH
Your soil pH (5.3–6.9) overlaps with Radicchio's range (6.0–7.0), though not a perfect match.
Soil Texture
The silt loam soil in Calhoun County is excellent for Radicchio — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (2.6%). Annual compost additions will help Radicchio.
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
Monthly Watering Guide for Radicchio
Radicchio needs approximately 0.7 inches of water per week (3" per month). Here's how your county's rainfall compares month by month.
| Month | Radicchio Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 3.8" | 0" | ❄️ Dormant |
| Feb | — | 4.6" | 0" | ❄️ Dormant |
| Mar | 3" | 5.3" | 0" | ✅ Rainfall sufficient |
| Apr | 3" | 3.8" | 0" | ✅ Rainfall sufficient |
| May | 3" | 4.4" | 0" | ✅ Rainfall sufficient |
| Jun | 3" | 4.1" | 0" | ✅ Rainfall sufficient |
| Jul | 3" | 5.2" | 0" | ✅ Rainfall sufficient |
| Aug | 3" | 5.5" | 0" | ✅ Rainfall sufficient |
| Sep | 3" | 4.1" | 0" | ✅ Rainfall sufficient |
| Oct | 3" | 3.5" | 0" | ✅ Rainfall sufficient |
| Nov | 3" | 3.9" | 0" | ✅ Rainfall sufficient |
| Dec | — | 4.6" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Mar–Nov in Calhoun County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Radicchio Heat Requirements (GDD)
What are Growing Degree Days (GDD)?
Growing Degree Days measure the total warmth your plants receive during the growing season. Think of it as a "heat bank" — every day above 50°F deposits warmth that helps your plants grow.
Each plant needs a certain amount of accumulated heat to mature. If your county provides more GDD than the plant needs, it's a great fit. If it's close, you may want to choose faster-maturing varieties or start seeds indoors to get a head start.
Radicchio Planting Timeline — Calhoun County, AR
Radicchio Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | February 15 | Feb 15 – Mar 1 |
| Transplant Outdoors | March 22 | Mar 22 – Apr 5 |
| Direct Sow | March 8 | Mar 8 – Mar 29 |
| Harvest | May 24 | May 24 – Jun 28 |
| Fall Sowing | August 26 | Aug 26 – Sep 9 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Start Indoors |
| March | Start Indoors Transplant Outdoors Direct Sow |
| April | Transplant Outdoors |
| May | Harvest |
| June | Harvest |
| July | — |
| August | Fall Sowing |
| September | Fall Sowing |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.7"/week · Natural rainfall sufficient
📅 Days to Maturity
60–80 days
🧪 Soil pH
Needs 6–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 8a
📆 Growing Season
227 days in Calhoun County
Growing Tips for Radicchio in Calhoun County
Direct sow Radicchio outdoors after March 22 in Calhoun 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
Check more plant combinations with our Companion Planting Checker →
Radicchio in Other Locations
Frequently Asked Questions
When should I plant Radicchio in Calhoun County, AR?
Calhoun County is in Zone 8a with an average last frost of March 22. Plan your Radicchio planting based on this frost date — see the calendar above for exact timing.
What planting zone is Calhoun County, AR?
Calhoun County, Arkansas is in USDA Hardiness Zone 8a. The average last spring frost is March 22 and first fall frost is November 4.
Your Calhoun County Garden Planner — Free
A 24-page printable planner built for Calhoun County (Zone 8a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.