<p>Hog plum, a&#xa0;nutrient-rich tropical fruit with high economic potential, faces limited commercial success due to poor fruit retention, suboptimal fruit quality and shorter shelf life. Gibberellic acid (GA₃), known for improving reproductive efficiency and postharvest quality in tree fruits, was applied to overcome these limitations. GA₃ was sprayed at panicle growth, 50% flowering and fruit setting stages, using six concentrations (0, 50, 100, 200, 300 and 400 ppm). While flower production peaked at panicle-stage spray (3695 panicle⁻¹), 50% flowering application accompanying fruit setting-stage treatment significantly improved fruit retention (5.21%), yield (47.01 kg plant⁻¹) and postharvest quality of hog plum. Dose-wise, 200 and 300 ppm GA₃ uniformly enhanced productivity and quality over other treatments. Notably, 300 ppm GA₃ at 50% flowering stage not only maximized fruit set (11.50%) but also increased fruit weight (108.27 g) and yield (62.30 kg) by 20% and 47%, respectively, while reducing fruit drop by 45% compared to control. Likely, flowering and fruit setting applications of 200–300 ppm significantly improved total soluble solids (9.67%), total sugars (5.63%), ascorbic acid (24.33 mg 100 g⁻¹) and shelf life (9.43 days), with minimized titratable acidity (0.33%). Moreover, GA₃ (200–300 ppm) declined seed weight by 20% and increased the edible portion by 15% compared to control. Conversely, higher (&gt; 300 ppm) and lower (&lt; 100 ppm) doses were ineffective across stages. Further, polynomial regression demonstrated trait-specific GA₃ responsiveness, with moderate concentration (240–290 ppm) effectively enhanced productivity and fruit physical and biochemical properties, suggesting timing- and dose-bound GA₃ application for hog plum improvement.</p>