Defending Domestic Produce Production Act of 2023

This bill amends U.S. trade law to better support seasonal agricultural producers, specifically fruit and vegetable growers whose harvest cycles are concentrated within short periods (under 8 weeks). It creates a new "core seasonal industry" definition and adjusts countervailing and antidumping duty procedures to apply only during the relevant harvest season, rather than year-round. To qualify for these streamlined procedures, petitioning producers must demonstrate support from at least 50% of the total production in key states during the prior three seasons. The changes apply to trade cases involving Canada and Mexico under the USMCA agreement.