re: Are sour beers seasonal?

quote:

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Tin roof had a very tasty sour beer and I know that's gone, but are they generally seasonal?

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Wasn't that a gose? If so, most goses are seasonal summer beers.

As for the rest of the genre, no, they're generally not "seasonal" per se. It's more that they're ready when they're ready. You can find a lot on the shelves year round, but you might not have the same ones on the shelf year round.