Woody Stems
As a frost-hardy perennial, older thyme stems tend to get tough and woody. When selecting stems to harvest, look for light yellow colored centers with bright green leaves. Pinch just before a "growth node", or a place towards the bottom of the stem where new stems are growing out on either side of the stem.
Read up on how to care for thyme here. For information on preserving thyme, please check out our complete Preserving Herbs guide.