This old Italian heirloom radicchio grows in an upright, columnar shape like a little urn. Pull away the lavish wrapper leaves to reveal a stunning red and white, blanched, sweet centre. Treviso is a cold hardy radicchio. Treviso chicory seeds produce plants that are beautiful in the garden. Try it grilled on the barbecue and drizzled with olive oil and balsamic vinegar. Or create a hot oil salad dressing and apply just before serving. Radicchio will stand up to heat, and this heat brings out the sweetness and improves the flavour. The long stems (petioles) of this radicchio are crunchy and succulent.