Saffron (Crocus sativus L.) Production in the Southern United States: Effects of Planting Date, Production System, and Drying Method

Crocus sativus L. (saffron), commonly known as “red gold,” is among the most valuable spices worldwide and has gained increasing attention as a high-value crop for small-scale farming systems. However, its production potential in the southern United States remains largely unexplored. This study evaluated saffron as an alternative specialty crop in Georgia by assessing the effects of planting date (early September vs. late October) and production system (open field vs. low plastic tunnel) on saffron yield during the 2023 and 2024 growing seasons at the Rodale Institute Southeast Organic Center. Simple postharvest stigma drying methods, including oven and microwave drying, were also evaluated descriptively for small-scale production. In 2023, a total of 1907 flowers were harvested, yielding 59.61 g of fresh stigma, whereas production declined in 2024 to 961 flowers and 22.89 g of fresh stigma. Year had a significant effect on yield, while planting date and production system did not show consistent main effects. A significant interaction between year and planting date indicated that saffron performance was influenced by year-specific growing conditions and management-related constraints, with early planting improving plant establishment. Stigma yield was limited for quality analysis; therefore, samples were composited, preventing valid inferential statistical comparisons for drying-method effects. Descriptively, concentrations of key apocarotenoids—crocin, picrocrocin, and safranal—were generally higher in 2024, with crocin values reaching up to 62.34. Higher-temperature drying (e.g., 100 °C) offered practical advantages due to substantially reduced drying time compared with lower-temperature (60 °C) or microwave drying; however, further replicated quality analysis is needed before firm conclusions can be drawn regarding drying-method effects. Overall, saffron production was feasible under humid subtropical conditions, but yield stability depended on stand establishment, soil fertility management, and year-specific growing conditions. These findings highlight the importance of integrated management of planting time, corm quality, production system, soil fertility, and postharvest processing for optimizing saffron production in emerging regions; however, larger-scale and long-term studies are needed to draw definitive conclusions.