Growing Radicchio in Zone 4
When to plant and harvest radicchio in Zone 4— based on your zone's frost dates.
Zone 4 sits comfortably within radicchio's best range (Zones 3–11), so it grows well here on a standard schedule.
Radicchio planting calendar for Zone 4
These months are derived from Zone 4's frost dates — last frost around Early – mid May, first frost around Mid September – mid October.
Start indoors
August
Sow outdoors
April
Transplant
July
Harvest
October
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Radicchio care at a glance
- Sunlight
- Full sun (6–8 hours); tolerates light afternoon shade in hot climates
- Water
- 1–1.5 inches per week; consistent moisture is especially important during head formation
- Spacing
- 10–12 in apart in rows 18 in apart
- Days to maturity
- 70–100 days from transplant
- Best zones
- 3–11 (annual; overwinters in zones 9–11)
Growing radicchio in Zone 4: FAQs
Can you grow radicchio in Zone 4?＋
Zone 4 sits comfortably within radicchio's best range (Zones 3–11), so it grows well here on a standard schedule.
When should I plant radicchio in Zone 4?＋
In Zone 4, start seeds indoors around August. Zone 4's last spring frost is typically Early – mid May and its first fall frost around Mid September – mid October, which sets the planting window.
When to harvest radicchio in Zone 4?＋
Expect to harvest radicchio in Zone 4 around October, depending on the season and variety.
Full Radicchio guide →
Complete care, problems, companions, and harvest tips.
Zone 4 overview →
Frost dates, climate, and everything to grow here.
November in Zone 4 →
What to sow, transplant, and harvest this month.