All harvested crops (along with anything able to be sold) may be put in the shipping bin to be sold. Almost all crops require active farming and maintenance, although every day, the player can harvest two Mushrooms from their underground cellar to sell.
In this context, "harvested crops" refers to produce that can be sold, as well as other items that are marketable. Most crops need regular care and attention, but daily, the player can collect two Mushrooms from their underground storage room to sell.