I don't know if this is an event in the game yet, but maybe someone could find/invent fertilizer that would help decrease the amount of time between new crops and can also be used on the berry bush when it gets down to less then 500 berries.

And on that subject, when someone pours a vial out onto the sand, perhaps occastionally something can come from it. Like they pour it on a crab or oyster and suddenly they have a massive food supply or make them poisonous.