At first it was background noise, nothing more, I swear. I wasn't really listening to the man on the radio talking about root balls, and even if I were, I was only half listening. I was curious, that's all. Not addicted. Not yet. But now I am. Come 7 a.m. on Saturday mornings I'm up and tuned in to 99.1 FM, sitting at the kitchen table listening to Paul Parent tell me things like "clematis requires sweet soil" and the way to make soil sweet is to sprinkle a little lime into it, but not bone meal because that attracts animals…