For quality seed production in root crops, salicylic acid foliar spray should be applied at concentrations between 100-150 mg L⁻¹ (or 0.5-1.5 mM). The optimal timing is during the vegetative growth stage, starting from early flowering and continuing through seed development phases. Applications should be made every two weeks or monthly during the reproductive phase when plants are transitioning from vegetative growth to seed formation. For root crops like carrot, radish, and beetroot, apply the spray during early flowering and seed stalk development stages to enhance stress tolerance, improve seed quality, and promote better germination rates. The foliar application should be done in the morning or evening hours to prevent leaf burn and ensure maximum absorption. This treatment helps in producing higher-quality seeds with improved vigor and germination capacity.