<p>Bud dormancy and subsequent growth in apple (<i>Malus</i> × <i>domestica</i> Borkh.) are regulated by complex biochemical and hormonal processes influenced by environmental conditions. The study evaluated three cultivars—‘Gale Gala,’ ‘Red Velox,’ and ‘Jeromine’—at three developmental stages (Dormant Tip, Silver Tip and Green Tip) in two agroclimatic locations (Nauni and Mashobra). Biochemical markers such as total phenols, total flavonoids, and antioxidant activity peaked at the Dormant Tip stage, showing significant effects of cultivar, site, and bud stage (<i>p</i> &lt; 0.001), with highest amount of phenolic content found in ‘Jeromine’ (251.54 mg GAE g⁻¹ dry weight [DW] at Nauni; 239.54 mg GAE g⁻¹ DW at Mashobra) and ‘Gale Gala’ having the greatest antioxidant capacity (60.39% at Mashobra). Declines in phenolic compounds and antioxidant activity were observed for all cultivars at the Green Tip stage (<i>p</i> &lt; 0.001). Hormonal assessment showed contrasting values for gibberellin (GA) versus abscisic acid (ABA)—GA increased significantly (<i>p</i> &lt; 0.001) from the Dormant Tip to Green Tip stage, with ‘Jeromine’ recording the highest gibberellin concentration (788.44 ng g⁻¹ DW at Nauni and 805.06 ng g⁻¹ DW at Mashobra), whereas ABA decreased significantly (<i>p</i> &lt; 0.001) from 1512.68 ng g⁻¹ DW at the Dormant Tip stage to 92.16 ng g⁻¹ DW at the Green Tip stage. An overall higher hormone concentration was observed in fruit from Mashobra, indicating the stronger influence of low temperature. The comparatively consistent biochemical resistance and flexible hormonal plasticity of ‘Jeromine’ highlights its suitability for mid-hill cultivation, indicating its potential resilience to climate variability. These findings emphasize the value of physiological and hormonal indicators in breeding programs and site-specific orchard management aimed at improving productivity, fruit quality, and stress tolerance in temperate apple production systems.</p>