How long for, and for what purpose? And are the bags waterproof/airtight (in which case the herbs will go mouldy after a bit), or not (no mould, but the herbs will dry out and may lose their flavour)?
Do you have freezer space? I just came across something about storing cut-up herbs in olive oil in ice cube trays.
Sorry I should have been more specific, I was wondering if I could store dried herbs in plastic sandwich bags. I usually use jars but I don’t have the space this year as I am saving a lot more varieties of herbs/plants. And yes, we have done something like that before except we used butter. It worked wonderfully and was delicious!
How many herbs? I don't have many, so they usually get wrapped in cheesecloth and hung up to dry. Once they have dried for a couple months, they are crumbled up and stored in small tin cans.
A follow-up with some photos. One of the herbs in my back yard is Anise Hyssop. The bees love it in the Autumn; there is a constant stream of Bumblebees on those flowers from late July, through August, and into September. And the scent is wonderful! Sometimes when I am in the back yard I get this delicious scent of licorice and rootbeer. And it makes a nice tea. I cut the plants, tie them together by their stems, wrapped in cheesecloth, and let them airdry in the garage for a couple months. The cheesecloth is inexpensive; I found this bag in Superstore. And when the leaves are dry, I crumble them up and save them in tin cans. I have several tin cans from David's tea, plus another one, from another brand I was given some time ago as a Christmas gift. I like using tin cans because it makes sure no insects or rodent can get in. (My place is pretty clean, but I am anal that way.) The tea is pleasant. A nice hint of licorice, but not too strong.