If you've a mind to do this, I highly recommend it. Lavender is known for it's relaxing effects. Did you know it is also an antibacterial? That means it good for you on several levels.
When you work with lavender, don't forget what a power this herb is! I've learned to add only a couple of dried sprigs to my six cup pot. Too much and Lavender can be extremely bitter. The fragrance is what I enjoy the most, and it doesn't take much to bring the aroma out.
BTW - This picture is just for show. Add your lavender to the hot water when you add your tea and/or mints. I also add sweetener, lately that's been stevia which I can also harvest from my garden. Did I say it was a wonderful summer?!!! It has been immensely enjoyable harvesting my own herbs and using them.
If you want to explore more recipes using Lavender I highly recommend "A Taste of Lavender" by Gloria Hander Lyons. My sister gave me this book and I've thoroughly enjoyed it. There's a wonderful collection of drinks, breads and pastries, appetizers, main dishes, soups and deserts. I had no idea you could use lavender is so many ways!