N. Velkov, V. Petkova
Abstract. The effect of Herbagreen mineral fertilizer on seed production of cucumber, melon and zucchini was evaluated. Three times treatment with the fertilizer at a dose of 0.04% at an interval of 14 days has a positive effect on seed yield in the studied cultures. Proven high effect was established in the indicator number of fruit per plant. There were no significant differences between treated and untreated (control) variants at the indicators: number of seeds per fruit, number of seeds per gram, weight of seeds per fruit (g), number of seeds per gram; absolute mass of seeds (g). Increasing the yield of the seed does not have any negative effect on the quality of the seeds. By the worked out regression equations the effect of application of Herbagreen could be foreseen.