- You will get 1000 Seeds of Kale Portuguese Couve Tronchuda Non-GMO Heirloom Vegetable Seeds. - Genus: Couve. - 1,000 Kale Portuguese Seeds Couve tronchuda Non-GMO Heirloom. - Portuguese Kale (Couve tronchuda) is the sweetest and most tender of all our kale varieties. - The leaves look like large collard leaves but with many white veins. - They are delicious finely sliced and briefly cooked. - Raw foodies also love this variety because of its tenderness. - The plants are heat and cold tolerant and very productive. 55 days.