The Veneto (especially the provinces of Treviso, Vicenza and Padua) is the biggest producer of asparagus in Italy. Bassano del Grappa, with over 100 asparagus farmers, claims the crown for producing the most white asparagus.
The season is in April and May, when it features on every menu (the classic dish is ovi e sparasi, chopped and smashed hard-boiled eggs and white asparagus, served with vinegar, olive oil, salt and pepper); some places offer all-asparagus menus in season.
The nearby village of San Zeno di Cassola holds Sagra dell' Asparago bianco in mid May
Five kinds are in the Slow Food Presidium:
asparago di Cilavegna (Pavia, in Lombardy)
asparago di Mezzago (near Milan)
asparago di Zambana (Trentino)
asparago Montine (Veneto)
asparago violetto di Albenga (Liguria)
asparagi alla rolantina: rolled up in prosciutto with cheese, breadcrumbs and butter, and baked
asparagi all'amatriciana: baked under guanciale and bechamel sauce
asparagi alla milanese: with butter, parmesan and eggs, and a fried egg on top
pasticcio agli asparagi
Even more desirable (but much much harder to find) is asparagi selvatici, or long, string-like wild asparagus; if you see people snooping around in fields and roadsides in early spring, that's probably what they're looking for. It's delicious on pasta or in an omelette, or in a risotto (good recipe here).
Images by alino1955, Diane Ruff