As of my last update in September 2021, saffron is traditionally grown in soil, but there have been some experiments and advancements in cultivating it using aeroponic methods. Aeroponics is a soilless method of growing plants, where the roots are suspended in a mist or air environment and provided with nutrient-rich solutions.
The aeroponic method for saffron cultivation aims to improve yield and minimize water usage, as saffron is a high-value spice that requires specific environmental conditions to thrive. By using aeroponics, growers can control factors like nutrient delivery, temperature, and humidity more precisely.
However, please note that advancements and developments in agricultural techniques may have occurred since my last update. For the latest and most detailed information on saffron cultivation using aeroponics, I recommend consulting recent research papers, agricultural experts, or relevant sources in the field.