Heirloom tomatoes are a variety of the fruit that is open-pollinated with seeds that have been passed down over time, hence the word "heirloom." Hundreds of individual species of tomatoes exist under the category of the heirloom tomato in a diverse range of colors, from the traditional bright red to deep purple-reds to vivid greens, yellows and oranges. Some varieties have more than one color on the same fruit. Heirloom tomatoes are prized for their flavor, which varies by species.
More than 100 years old, the Brandywine heirloom tomato plant produces large fruit with a strong flavor. The Brandywine is one of the more popular heirloom tomato varieties. A high level of variation is found in terms of color among Brandywine tomatoes, with some of the lighter shades being pink and yellow and some of the darker ones appearing so deep purple as to be almost black.
As the name implies, Orange Banana heirloom tomatoes are both orange, although they can also appear as yellow, and have an oblong shape, much like the typical Roma tomato variety. Orange Banana tomatoes excel when made into a paste or when used in cooking, as with sauces. The acid content of this type of tomato is low and the fruits typically have a sweet taste.
The Tigerella variety of heirloom tomatoes is a high-yielding type that has a two-toned appearance, with a reddish main body streaked with orange or golden yellow. Typically, the fruits are small or medium sized with a tangy flavor.
White Currant heirloom tomatoes have an unusual very pale yellow to pure white appearance and are typically smaller in size than the ordinary cherry tomato. The plant produces the small fruit in large clusters. In terms of taste, the White Currant is quite sweet.