Treviso

Radicchio

Zone 4a Save Garden

🌱 60d to harvest Rosette

Crisp, cool-hearted heads emerge in about 60 days with a dramatic, wine-dark red over pale ivory ribs—so vivid they look lacquere…

Crop Dates

Milestone	Date
Start Indoors	Direct Sow
Last Frost	May 15th
Transplant / Sow Outdoors	May 15th
Harvest Begins	Jul 14th
Harvest Ends	Sep 24th

Crop Details

Trait	Value
Days to Maturity	60
Sun Requirements	Full Sun
Growth Habit	Rosette
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	45
Min Soil Temp (°F)	40
Min Night Temp (°F)	28
Harden Off (days)	Not Required

Recommended Companions

Royal Chantenay Carrot

Danvers 126 Carrot

Frequently Asked Questions

What disease or pest problem most commonly affects Cichorium intybus (Treviso) and how can I control it?

Fusarium and other soil-borne wilts can show up as sudden leaf yellowing, drooping, and poor regrowth in mid-season. Remove and discard affected plants immediately, avoid replanting chicories/lettuces in the same bed for several years, and keep foliage dry by watering at the soil line rather than over the leaves. If aphids appear, knock them off with a strong water spray and use insecticidal soap as needed, especially on tender inner leaves.

How often should I water Treviso while it’s actively growing (full sun, about 60 days)?

During the main growth period, keep the top 1–2 in (2.5–5 cm) of soil consistently moist but not soggy—aim for watering when it starts to dry on the surface. In full sun, that often means about 2–3 deep waterings per week, increasing frequency during hot, drying weather. Avoid standing water because chicory roots and crown area are prone to rot when the soil stays wet.

How do I know when Treviso (Cichorium intybus) is ready to harvest?

Harvest at about 60 days when heads are firm and reach the typical size for your planting spacing, with tight, elongated leaves that snap less easily than immature growth. If you cut too early, leaves stay loose and bitter; if you wait too long, the plant can become stringy. For the best flavor, harvest before significant bolting and before prolonged heat—then use promptly for peak crunch.

Crisp, cool-hearted heads emerge in about 60 days with a dramatic, wine-dark red over pale ivory ribs—so vivid they look lacquered in the garden. The leaves are tightly layered and pleasantly bitter, with a clean crunch that holds beautifully from first harvest through the last bite, making Treviso ideal for fresh salads, roasting, and bold braises. Let its elongated form and striking striping inspire you to grow a radicchio that turns everyday meals into something richly seasonal and elegant.

Sowing Tips

Transplant Conditions

Wait until soil reaches 40°F and nights stay above 28°F before moving outdoors.

Expert Note

For best mild flavor, grow in cool weather and avoid heat spikes; bitter levels rise when plants bolt.