Japanese Knotweed (Fallopia japonica) is another wild edible plant that is ripe for picking. I gather knotweed when it is about a foot tall. I act fast when I find this plant emerging because it grows rapidly — some stands near me have stalks five feet tall already! This past week, I picked and froze 5 quarts of young shoots. Cooked until soft and mushy, it can be combined with fruit for a tasty sauce.