We use heirloom varieties for tomatoes, probably over a dozen varieties. We use a couple heirloom varieties of lettuce, beans, some peppers and kale. We use a wide variety of heirloom seeds, but obviously since we have so many different varieties of tomatoes, they are my favorite.
This is true even though the typical heirloom tomato can be ugly. Others, though, can be really beautiful in their shapes and color. Some of mine are two to three colors with green stripes or a ye