After making a recipe that called for fresh thyme, I had a small amount left over. The grocery store-bought sprigs weren’t going to stay good for long, so I divided them in half and put one half in a glass of water, and the other half dipped in rooting hormone and then into damp soil in a bright area. While the couple of sprigs in water didn’t make it, the thyme in soil has grown roots and is showing new growth. If it can stay strong until the frosts end, then I will have a perpetual source of thyme from now on. No need to get more from the grocery store!