Two field experiments were conducted during 2020/2021 and 2021/2022, at the Experimental Farm, Faculty of Agriculture, New Valley University, New Valley Governorate, Egypt with aim of investigation of phosphorus (P) as soil fertilization and borax as foliar application on growth, yield and chemical constituents of table beet. Four phosphorus levels, i.e.,30, 45, 60 and 75 kg/Feddan in the form of calcium phosphate were applied as soil application and four borax levels, i.e., 0, 2, 4 and 6 g/L were applied as foliar application in the recently reclaimed areas, especially New Valley governorate as a promising area for agriculture expansion in Egypt. The results showed that application of P at 60 kg/feddan improved the vegetative growth and root parameters, total sugar, total carbohydrates, soluble solids content (SSC), phenolic, total betalains and mineral contents of table beet. In addition, foliar application of borax at 4 g/L improved the above-mentioned traits compared to other rates. In addition, the combination between P at 60 kg/feddan as soil application and borax at 4 g/L as foliar application was the more effectivefor enhancing yield and root quality of table beet.