Brandywine tomatoes are among the slowest maturing varieties of popular tomato cultivars. But they are worth the wait. Growing up to 1 lb in 80 to 100 days, these beautifully sweet, beefsteak-like fruits are said to be the tastiest of all heirloom tomatoes. The Brandywine Tomato seems to possess just the right balance between sweetness and acidity. Compared to the everyday, garden variety store-bought tomato, the Brandywine not only outweighs the competition, it has a distinct advantage in taste.Brandywine tomatoes are among the slowest maturing varieties of popular tomato cultivars. But they are worth the wait. Growing up to 1 lb in 80 to 100 days, these beautifully sweet, beefsteak-like fruits are said to be the tastiest of all heirloom tomatoes. The Brandywine Tomato seems to possess just the right balance between sweetness and acidity. Compared to the everyday, garden variety store-bought tomato, the Brandywine not only outweighs the competition, it has a distinct advantage in taste.