Role of Planting Date on Yield and Cannabinoid Content of Day-neutral and Photoperiod-sensitive Hemp in Georgia, USA

Industrial hemp ( Cannabis sativa ) cultivars used for flower, fiber, or seed production are usually considered short-day plants and flower in response to photoperiod. However, some of day-neutral, where induction may be independent daylength. Day-neutral were planted before recommended dates studied field experiments conducted Watkinsville, GA, Spring 2020 2021. (Pipeline Maverick) photoperiod-sensitive (Von Whitehouse Cherry) on 9 25 Apr 11 28 May determine the impact planting date yield quality. Planting did not cultivars, but yields day-neutral decreased as progressed. Average greater than both study years. Cannabinoid concentrations flowers affected by cultivar year impacted date. Cannabidiol was most prevalent cannabinoid tissue with ranging from 6.5% 10.5%. Flower biomass suggest that spring season extended using southeastern United States.