Stardew Valley has a "Polyculture" achievement, which reads:
Ship 15 of each crop.
However, it's not clear on what qualifies as a crop. For example, a lot of the items that can be foraged can be turned into seeds and then grown from seed – do they qualify? What about things like animal products?
Best Answer
A complete list can be found here on what needs to be shipped:
In addition, the guide also states strawberries (spring) and coffee beans (spring or summer) or also needed. A user in the comments in the guide (and here) also states that flowers are not necessary (they have been removed from the quote).