Warning

Ok......so warning might sound a bit extreme. Many of these plants are invasive, it's one of the reasons we love them. This beautiful Amaranth for example will drop thousands of seeds if left to grow out and year after year you'll have 6 ft tall edible flowers in your garden ( young leaves and the seeds are edible.) Raspberries and blackberries will send out rhizomes and in a few short years you'll have a nice big bramble of berries. Mints are notorious for taking over gardens. I think you get the point.