white grapes trebbiano trebbiano is the most common white grape variety in italy accounting for around a third of all italy s white wine some of the sub varieties found in italy include trebbiano toscano trebbiano romagnolo trebbiano gallo and trebbiano d abruzzothe wine itself is crisp and very neutralhite grapes trebbiano trebbiano is the most common white grape variety in italy accounting for around a third of all italy s white wine some of the sub varieties found in italy include trebbiano toscano trebbiano romagnolo trebbiano gallo and trebbiano d abruzzo