- You will get 2000 Seeds of Endive - Red Treviso Non-GMO Heirloom Vegetable Seeds. - Genus: Cichorium. - 2000 Endive Seeds - Red Treviso Non-GMO. - Red Treviso or Rossa di Treviso, Rouge de Trevise is a famous and much-loved radicchio from Treviso, Italy just north of Venice. Considered to be the best by connoisseurs. - Forms long slender green leaves in summer that turn deep-red with white veins in cooler weather. This non-heading variety is crisp yet tender having a tart taste.