The Costoluto Fiorentino tomato, with its heart-shaped, deeply ribbed fruits and intensely sweet flavour, is a prized heirloom variety that has captivated gardeners and chefs alike. It's a beefsteak tomato with an indeterminate (vine) habit, best grown under glass. It bears heavy crops of bright red, flattened, strongly ribbed fruit with firm, succulent flesh and a good fruity flavour.