Autumn may seem like an odd time to start a garden, but it actually makes sense, as this week’s guest, Tyson Stillman, explains. He’s funny, pithy, and an amazing source of gardening experience and information—a remarkable combination, considering that he’s still an undergraduate. He’ll walk you through the garden he’s putting in at his new house (two blocks from mine, I was thrilled to learn), explaining soil types, how crop rotation affects soil fertility, and more. And trust me—you don’t want to miss hearing Tyson tell how he tilled his garden “a million times.”

You’ll also hear this week’s Garden Tip, and a moment of reflection about the show’s theme, which might be called “Against Purity.”