I'm still chewing on this, slightly. Pictures I find of young artemisia plants look a bit different. There are many species, it certainly looks close to the mark.
These are Artemisia Vulgaris, if left alone its got more of an upright growth habit, sometimes just a single thick stem that can get 8ft tall. I pinched these as out as I grew them from seed so thats why they're bushier.
Yours looks more like it has a rosette formation, like the way dandelion, hawksbit and cats ear grow.