Well we tried to grow potatoes in tires this year and today when my DH couldn't wait any longer and he knocked over 1 set there was ABSOLUTELY nothing there. Any idea what we did wrong? He was so disappointed that he knocked over a second set of tires (Different types of spuds) he found the same result - NOTHING. We thought we followed instructions carefully but the soil right down to the bottom layer was very wet and mucky. Could we combined with Mother Nature have overwatered this experiment?We planted at the end of April (we live in eastern Ontario) and just kept adding soil and tires when the plants were 8 in. or so tall. We would cover about 4 in. and leave about 4 in. showing. We were up to 7 tires on the Pontiacs and the Kennbecs. Sure would appreciate some input my DH is devastated he is not going to be the Potato King of Verona. Many thanks.