Purple dead nettle, Lamium purpureum.
Though similar to a nettle in appearance, it is not related, doesn’t sting and is a member of the Mint family. The flowers may be produced throughout the year, including mild weather in winter. This allows bees to gather its nectar for food when few other nectar sources are available. It is also a prominent source of pollen for bees in March/April, when bees need the pollen as protein to build up their nest. WT
