Grape seedless varieties are generally treated with gibberellic acid twice: the first time from flowering to 65438+ 0-3 days after flowering, the inflorescence is treated with gibberellic acid 25-30 mg/L; The second time is to treat young fruits with gibberellic acid solution with a concentration of 50-200mg/L on/kloc-0-15 days after flowering. Personal opinion, for reference only. The situation varies from place to place, please operate under the on-site guidance of local agricultural technicians.