Using dormancy breaking chemicals is necessary to produce temperate fruits in low chill regions. As usual Hydrogen cynamide is the most common chemical which used in this concern. Recently, some country restricted it due to its high toxicity. Therefore, this experiment aimed to using an alternative product Erger® (is a biostimulator containing an organic nitrogen and polysaccharides with low toxicity) and calcium nitrate. Different doses of Erger are used (3 % and 5%) and calcium nitrate at a concentration of 3% lonely or combined with the prementioned concentrations of Erger. The spray was 45 or 30 days before bud opening or in both of them. Red Roomy grapevines were used for this experiment. Results showed that spraying dormex or Erger at a concentration of 5% combined with calcium nitrate at a concentration of 3% increased bud opening % also improved the vegetative growth and induced (N, P and K) leaves of Red Roomy grapevines content.