To the best of my knowledge they are all edible, however, they don't have much flavor compared to the varieties that are specifically grown as herbs. Two that are particularly yummy are "Lemon Thyme" which also makes a nice groundcover and "Orange Balsam Thyme" which is a little taller growing than the creeping thymes. As their names suggest, they have a zesty citrus-like flavor and aroma.

Thankyou pianojuggler. I did plant some lemmon thyme. filix