Treviso 4 Tardivo

Family: Asteraceae Vegetable

Crisp, cool-hearted leaves unfurl into a dramatic, elongated rosette—silken-smooth ribs and a deep, wine-burgundy glow that tastes as vivid as it looks.

Treviso 4 Tardivo’s flavor is pleasantly bittersweet with a clean snap, ideal for roasting to caramelized tenderness or for fresh salads where its tight texture holds beautifully. Grow it for the showpiece crunch of late-season radicchio—bold, elegant, and unmistakably market-class at maturity.

Light: Full SunMaturity: 75 DaysHabit: Rosette

Botanical illustration of Treviso 4 Tardivo

Planting schedules and alerts are optimized for Columbus (Zone 6b).

Crop Dates

Milestone	Date
Start Indoors	Direct Sow
Last Frost	Apr 25th
Transplant / Sow Outdoors	Apr 25th
Harvest Begins	Jul 9th
Harvest Ends	Oct 16th

Crop Details

Trait	Value
Days to Maturity	75
Sun Requirements	Full Sun
Growth Habit	Rosette
Support Needed	None
Planting Depth	Surface
Germination Temp (°F)	45
Min Soil Temp (°F)	40
Min Night Temp (°F)	28
Harden Off (days)	Not Required

Culinary Notes

Chef's Note

Treviso 4 Tardivo brings a crisp, elongated crunch and a wine-bitter edge that needs either heat for caramelized softness or dressing that’s sharp and fat-forward. Its tight leaf structure won’t collapse under vinaigrette—so you get bite, not wilt.

Best Uses

roast/braise until edges caramelize while the core stays crisp-tender
shave fresh into salads that need a tight, non-wilting crunch
grill or char lightly, then dress aggressively to tame the bitterness

Flavor Profile

pleasant bittersweet bite cool, crisp snap with silken ribs clean, winey tang that lingers

Kitchen Pairings

balsamic vinegar Parmigiano-Reggiano pecorino romano walnuts pancetta mustard vinaigrette

Frequently Asked Questions

What’s a common disease pest for Cichorium intybus (Treviso 4 Tardivo), and how do I control it?

Watch for slugs/snails and leaf-damaging aphids, especially during cool-to-mild periods when plants are dense. Hand-pick slugs at dusk and set copper barriers or bait where legal, and spray aphids off with a strong water jet before populations build. If you see leaf spots that spread in wet weather, remove affected leaves promptly and keep foliage drier by watering at the soil line rather than overhead.

How often should I water Treviso 4 Tardivo during the main growth to keep it productive?

During the main head-forming period (about the first 6–8 weeks after emergence), keep the soil consistently moist but not waterlogged—aim for about 1 inch (2.5 cm) of water per week total, adjusting for rain and heat. Water deeply when the top 1 inch of soil dries, since shallow frequent watering can lead to uneven growth and bitterness. Mulch helps stabilize moisture and reduces stress that can make leaves tougher.

How can I tell when Treviso 4 Tardivo is ready to harvest?

Harvest at around 75 days when the plants are firm and well-formed with tightly packed, elongated leaves—avoid waiting until leaves loosen. A practical sign is that the core feels solid when you gently press the base, and individual plants have reached their typical size for your bed spacing. Cut at the base with a sharp knife, preferably in the morning for best texture.