How to handle herbs over the winter?
This was my first year growing herbs, and they came out great. I am in Cincinnati (southern part of zone 6). Pictured (pic is about a month old so they're all bigger) from left to right, peppermint, parsley, basil, sweet basil, rosemary, tarragon, lemon balm, dill, cilantro, greek oregano, italian oregano, purple sage, green sage, lemon thyme, and chocolate mint. Only ones that didn't do well are parsley (idk why) and cilantro (sowed from seed late, in July - it's about 3x bigger now though).
So my plan for the winter is to bring some herbs inside, leave some outside in my mini zip up greenhouse, and leave some out in the open. I will of course harvest the annuals, including the basil, parsley, dill and cilantro.
Inside: Rosemary (though I may keep in greenhouse)
Greenhouse: Oreganos, thyme, sage, tarragon
Out: Mints, lemon balm
And my question is, does this sound OK (will everything outside survive in the greenhouse or against the house in pot)? And also, what happens to the herbs over the winter? Do they just stop growing, or do they die down at all, or what? Not sure if I should harvest a bunch now (outside of the annuals I will harvest), and even the annuals - should I just keep them near a window and pick some when I need, or should I harvest and dry them all now?
Any tips, herb specific or general, would be appreciated. Next year, I plan on putting some of the perennials in the ground so that they will survive winter better. I just ran out of time this summer to make an appropriate spot (though I could sink some of them into my raised garden bed they are currently sitting on).