Bianco di Trieste Zucchini This page first published: Oct 12, 2005 · Updated: May 9, 2018 · by CooksInfo. Copyright © 2021 · This post may contain affiliate links · This blog generates income via ads · Bianco di Trieste Zucchini is a long zucchini with very pale green skin. 45 days to maturity. Cooking Tips The flesh of Bianco di Trieste stays together when cooked in casseroles, soups and stews.