??? ???? ??? ??????? ?? ????? ??? ????? ? ????????? ???? ???? ? ??? ?? ????? ???? ?? ???? ??????? ?????? ???????? ??????? ? ????????? ?? ???? ?????.Rainwater is a good selection for hydroponics as you won't have to worry about the initial salt concentration, and it could be gathered from greenhouse roofs.Phosphorus is crucial for the event of