Although it’s still late March, I recently started noticing more purple deadnettle (Lamium purpureum, Lamiaceae). This cold-hardy herb can grow and even flower during mild winter weather.
It’s called “deadnettle” since it superficially resembles nettles, but it doesn’t sting. This is because it’s actually in the mint family. Like other mints, it’s edible.
I think it looks really cool, but it’s an invasive species here in North America. I see a lot of it on the margins of cultivated areas, which are common here in southeast Michigan.