80 Days. Cour De Bue tomato is a desirable, nice sized oxheart, that will lighten up your garden. When they start ripening they are something to see! Prolific, wispy leaf vines produce plenty 5-10 ounce, pink fruits that are perfectly heart shaped and have a complete tomato taste. Oxhearts aren’t usually acidic and Our De Blue isn’t either! It’s sweet, with great texture, not to forward tasting and perfect for sandwiches and sauces. you must try this one!