Trainwreck x Hawaiian THCa: 18.77% Delta 9-THC: 0.192% Pineapple Express is known for its tropical and fruity aroma and flavor, reminiscent of pineapple, and is reputed to produce effects that are uplifting, energizing, and mood boosting. It is created by breeding Hawaiian and Trainwreck strains, resulting in a unique flavor profile that is sought after by many cannabis enthusiasts.