Hazelnut

The Hazelnut is a limited, multi-harvest, uncommon crop introduced in the Chubby Chipmunk Event, and that combination of traits is exactly what makes it interesting economically. Uncommon rarity keeps its per-fruit base value modest, but the multi-harvest trait is the real value driver: a single planted seed keeps producing nut after nut, so its return is measured over the whole life of the plant rather than one payout.

Because it regrows, Hazelnut rewards patience over churn. You do not replant constantly the way you would with a one-and-done crop, which means its effective cost per fruit drops the longer you leave it in the ground. The smart move is to dedicate a permanent plot or two and let the harvests compound, then target stacking growth mutations on those repeat fruits, since any multiplier applies again on every future pick.

Being event-limited, it cannot be rebought once the Chubby Chipmunk window closes, so its progression role is a steady background earner rather than a burst money-maker. New players get a low-maintenance income stream; established gardens get a reliable multi-harvest slot worth keeping mutated and untouched.