I'd like to put down some cardboard for weed control in my garden this year, and the place I work at gets plenty of scrap cardboard that I can use. Problem is, nearly all of our items come from China, including the cardboard. I know the USA and EU have environmental laws that make cardboard from those places safe, but China does not.
Read also in a mycology book never to use 3rd-world cardboard for mushroom growing since they contain dioxin. I won't be growing mushrooms, and I'm pretty sure they concentrate toxins very intensely anyway hence the book's warning.
But long story short, will it harm my plants and myself to use Chinese cardboard in the garden? Is it safe to till into the soil at the end of the season?
Read also in a mycology book never to use 3rd-world cardboard for mushroom growing since they contain dioxin. I won't be growing mushrooms, and I'm pretty sure they concentrate toxins very intensely anyway hence the book's warning.
But long story short, will it harm my plants and myself to use Chinese cardboard in the garden? Is it safe to till into the soil at the end of the season?