Seed application, commonly called seed tanning or seed treatment or seed coating, consists in applying substances (fertilizers or biostimulants) to the seed in a precise and localized manner, aimed at stimulating a more rapid emergence of the plants. This allows to safeguard the value of the seed for the benefit of the productivity and quality of the crop, thanks to the physiological effects of tanning and to the greater resistance of the plants to abiotic stresses. It has been shown that the use of tanned seed, compared to untreated seed, leads to significant production increases. In fact, it is estimated that without the use of tanned seeds there could be crop losses even higher than 20% and possible cost increases of up to 200%. Seed quality is an important aspect of the modern cultivation strategies since uniform germination and high seedling vigor contribute to successful establishment and crop performance.