Comparing Organic and Synthetic Hydroponics for Sustainable Hemp ( Cannabis sativa ) Cultivation

Authors: Pooya Keshavarz, Alex R Ellram

SUNY Campus: SUNY Cobleskill

Presentation Type: Poster

Location: Old Union Hall

Presentation #: 25

Timeslot: Session B 10:15-11:15 AM

Abstract: As demand for sustainable hemp (Cannabis sativa) cultivation grows, producers seek efficient, eco-friendly, and cost-effective alternatives to conventional hydroponic systems. This study compares organic and synthetic hydroponic feeding in a controlled ebb-and-flow system, evaluating plant growth, root development, nutrient uptake, cannabinoid production, and terpene profiles using the Victory Haze CBD cultivar. The organic hydroponic system repurposes kitchen and garden waste into bioavailable nutrients through a hybrid feeding approach. This system includes (1) worm castings in coco coir media, (2) aged and buffered worm leachate with homemade calcium and magnesium (from eggshells and Epsom salt) in the reservoir, and (3) weekly topdressing with compost teas from organic waste. The synthetic system follows a precision feeding chart with mineral-based nutrients. Both systems operate under identical conditions in a controlled cultivation tent. Key parameters measured include plant biomass, root-zone health, microbial diversity, pH stability, EC fluctuations, cannabinoid content, and terpene profiles. This research examines whether organic hydroponics can match or exceed synthetic feeding in plant performance while enhancing sustainability. By converting organic waste into plant-available nutrients, this study highlights the potential of automated organic hydroponic systems to support circular agricultural practices. Findings may inform sustainable, resource-efficient hemp production and bridge organic cultivation with hydroponic precision feeding.