Which herbs die back, and which green up?
I got a decent herb bed started in my new home last year, containing most of the perennial basics. What I'm wondering though, is which of them will die back to the ground and send up new sprouts, vs. which of them will just turn green again and keep going.
Can any of you enlighten me?
Some of the things I've got, for which I'm not clear:
thyme (vulgaris & one other)
lavender (munstead & one other)
I've also had a marjoram plant, for which I believed the label that told me "perennial," in spite of the fact that my memory told me otherwise. I left it in the garden last Fall, but I've since come to believe that it's only a perennial in zones 8-9 or so, not in my zone 6...so I doubt that will come back at all. Is this correct?