Today is May 20, 2021. I'm adjusting the standard plants. If you have any questions, please visit our forum with photos. I'm not a professional, but I just love hydrangeas, so I can't give advice without seeing them:
https://www.tomat-pomidor.com/forums/...% D0%B0%D0%BD%D0%B8%D0%B5-%D1%80%D0%B0%D0%B7%D0%BC%D0%BD%D0%BE%D0%B6%D0%B5%D0%B D%D0%B8%D0%B5-%D1%83%D1%85%D0%BE%D0%B4/page/261/?tab=comments#comment-2059687