Flame seedless grapevines treated during 2012 and 2013 seasons with potassium silicate at 250 ppm
either singly or in various combinations with vitamins K & E & D & A & B12 each at 50 ppm and C at 500 ppm as
an attempts for promoting berry weight and colouration of clusters. Each vine was sprayed four times. Spraying
silicon and or these vitamins was superior than the control treatment in improving growth, yield and quality of the
berries. Using vitamins was favourable than using silicon in this respect