Zinfandel of the Month is a regular feature on Zinfandel Chronicles. Keep in mind that although the Zinfandel of the Month might be an older bottle, the current vintage will be one you can find at retail or via the mailing list. The May Zinfandel of the Month is the 2012 Rodney Strong Knotty Vines Estate Vineyards. Rodney Strong was one of…