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The impact of boron’s pre-harvest treatments on the quality of early grapes cultivars “Perlette” and “King’s Ruby” under room and storage temperatures were explored. The vines were exhibited to foliar applications with 0, 0.20, 0.30, and 0.40% boron at 15 d break after spraying fruit till maturity. Foliage studies for photosynthesis activity, pre- and post-harvest, and overall analysis of fruits were performed each 7d intervals for 4 wk. A 0.30% boron enhanced the vines’ physicochemical properties of the photosynthesis activity. Meanwhile, boron was used to improve ascorbic acid, which improved the postharvest properties of grapevine while decreasing the repulsive phenolic content. Grape cv. “Perlette” and “King’s Ruby” delivered 31.12 and 33.65 percent more than the control, respectively, at 0.30 percent of boron. TSS were about 8.9 and 13.7% in cvs at the same period. ‘Perlette’ and Kings Ruby, compared with the …