I know this was a dumb move, but I just bought a plastic bag of christmas ferns from Walmart. The brand is Vanzyverden. The ground here is still frozen, so I'm wondering what the best way to preserve these is before spring. Should I stick them in the fridge? Should I remove them from the bag? The directions say to plant after all danger of frost, but if they are hardy, can I get them out earlier?

Thanks.