We have received frozen produce in the past. For example, not too far from us in the city of Lethbridge there are packing plants that take sweet corn for the frozen corn market. We've received that from them in the past, and frozen green peas.
Most of what we receive is fresh, though: damaged, bruised crops that have had some hail damage to them, potatoes that get broken and bruised in the harvest. It just goes on and on when you think about it.