On one of my trips out of the woods after scouting before the upcoming deer season, I like to grab the tops off a couple milk weed plants that are busted open ( or about to bust open ) and I put them in a dry paper bag. I also will grab some golden rod flower tops and place them in a paper bag . When I get home, I put the bags in a cool dry place (out of humidity) and within a week, the flower tops are dry and the inside of the milk weed pouchesare also. I take these with me to my stand and I let em fly. And it doesn't cost me anything.