There are several ways to dry herbs but the easiest and most economical is to air dry them. This method when done correctly is almost fail proof and works for all types of plants (although I wouldn't try mushrooms).
Buy your herb plants fresh from the farmers market or grocery store. If you can get them with the root ball attached this will keep them fresher longer. It's important for the herbs to be as fresh and healthy as possible. Old and diseased plants will not dry well and will deteriorate during the process.
As well as fresh healthy plants you need to select plants with the longest stems possible tie the herbs with string at the stems to create little bouquets and then hang them upside down in a cool, dark, dry place. A storage cupboard can be an ideal place and a coat hanger can make a good hanging frame.
Small delicate plants such as rosemary, mint and thyme will dry in about two to three weeks. Larger items such as chili peppers will need longer depending on their size. Dried herbs can keep their potency for up to twelve months after drying.
