This is the first time I have seen Wilt Pruf sold as an accompaniment to holiday wreaths and other decorative cut evergreens around here. There was no signage, but I am assuming you’re meant to spray it on them as a preservative. I wonder what the point would be—with cold weather impeding their decay, how long do you really need a wreath to last? Mine always look just as good when I take them down—sometimes in early spring—as they did when I put them up in December. And it’s not like you’re trying to keep leaves alive through the winter, as with rhododendrons (not sure that ever worked either). This stuff is dead. It's over.
Inside the house I might take it more seriously. Would this keep decorative greenery from drying out before I’m ready to get rid of it? But then you have the danger of WP dripping all over everything and most likely interfering with the evergreen fragrance, which is the main reason I have it. Hmm. Spray it on outside and let it dry? Will it kill the scent?
If there is any good reason to treat cut evergreens with this, I’m interested in knowing about it. If there isn’t, then here’s just another excuse to spray stuff around for no reason.