Yes — crop is the right word. Oranges grown together on a farm or in a grove are called an orange crop, and the place where they’re grown is usually called an orchard or plantation, depending on the region.

Quick distinction

  • Crop = the oranges as an agricultural product.
  • Orchard = the land where fruit trees like oranges are grown.
  • Harvest = the oranges collected from the trees.

So you could say:

  • “This farm produces a large orange crop.”
  • “The orchard had a great orange harvest this year.”

In simple everyday speech, yes, a bunch of oranges you grow is called a crop.