Lemon Balm (melissa officinalis)
This is a fast spreading mint that really does smell wonderfully similar to lemons. Lemon balm is an soothing, uplifting herb, both taken internally, and as a companion outdoors.
It makes a richly soothing tea that cannot be over-consumed. However, its powers go far beyond that. Medicines made with lemon balm have been shown to help fight both bacterial and viral infections including the herpes virus, which causes cold sores.
More information about this beloved herb can be found here and here.
It seems to me that no homestead is complete without a nice patch of lemon balm somewhere.