The distinction between sour cherries (0809210000) and other cherries (0809290000 series) is based on botanical variety — primarily Prunus cerasus for sour types versus Prunus avium for sweet types. Commercial invoices and phytosanitary certificates should clearly state the variety or species. If documentation is ambiguous, CBP may request additional evidence or reclassify the shipment.

The bulk of fresh sour cherry imports are directed toward food processors — canneries, pie filling manufacturers, and juice producers — rather than retail fresh markets. This processing-sector demand means import volumes tend to track processor contract cycles and can be highly concentrated in specific seasonal windows aligned with production schedules.