Long day, sore feet, tired of noise: a nice cup of herbal tea is just what the doctor (should) order. Herbal teas, also called tisanes, differ from “real” tea (Camellia sinensis) in that they rarely contain caffeine. Made from herbs, spices, and other plant material, tisanes are soothing and, in some instances, medicinal.
Good herbs for tea that should grow well in your garden include chamomile (leaves and flowers), fennel (leaves and seeds), hyssop (leaves and flowers). For just their leaves, you can grow bergamot, aka bee balm (Monarda didyma), betony (Stachys officinalis), lemon balm, applemint, peppermint, spearmint, and sage. All are hardy to at least zone 5. [Note: watch the spread of any of those plants in the mint family.]
Lemon verbena and scented-leaf geraniums should also thrive to zone 5 in the summer, though they are not frost hardy. And don’t forget rose hips, raspberry and blackberry leaves, and the flowers or elderberries and linden trees (Tilia spp.). Though not usually grown in vegetable gardens, they too are valuable additions to the homegrown tea lover’s pantry.
Remember to dry all of your ingredients well, then store them (as whole as possible) in a dark, cool place until you’re ready to use them, preferably in glass jars.
I’m partial to this post which combines flavor ideas as well as focusing on the healthy aspects of herbal tea: https://www.thewellessentials.com/blog/how-to-make-your-own-homemade-herbal-tea-blends