ReadonlyalphaReadonlyasThe day being asked about.
ReadonlyharvestedWhen it was picked, or null if the bag doesn't say.
ReadonlypackagingHow the brewer keeps it.
ReadonlypurchasedWhen the brewer bought it, or null if they didn't record it.
ReadonlystorageThe brewer's own storage temperature, °C.
What hopAlphaRemainingFromDates needs to know about a lot.