Cardboard Method Inventor Tells All: No-Till Gardening Guide
Cardboard year after year in the same garden spots is not good due to other nasty cardboard ingredients. After two years of cardboard-floor, you should have enough viable soil to continue building the soil up with leaves & compost & woodchips etc.
I have done this two for decades, & how I can grow our yummy & Award-winning Veggies in just 2 inches of excellent fertility. You can as well.... 🙂