I was watching "Beaver's Pigeons" with a friend whose expertise is landscaping, gardening, etc. He spotted a shrub in the scene where Larry and Whitey bury the pigeons in Beaver's back yard and he recognized it as being grown and growing only in zone 9 - the southernmost growing area of the US.

Considering that the show was filmed in Southern California, it doesn't surprise me that a zone 9 shrub was in the yard, However, I don't think that can be used as a clue as to where Mayfield is. On the show "The Waltons", if you looked close you could sometimes see a palm tree in the background, but that show was set in Virginia, so the glimpse of a palm was just a blooper.

Considering that the show was filmed in Southern California, it doesn't surprise me that a zone 9 shrub was in the yard, However, I don't think that can be used as a clue as to where Mayfield is. On the show "The Waltons", if you looked close you could sometimes see a palm tree in the background, but that show was set in Virginia, so the glimpse of a palm was just a blooper.

Well, yes, the palm in "The Waltons" was a blooper - it was unintended, overlooked, an error - but the shrub in LITB was deliberate, ie. it was part of the set decoration.