Seed aging is a major constraint for plant establishment in arid and semi-arid ecosystems, where poor seed vigor directly limits species persistence and restoration success. Desert species are particularly vulnerable to storage- and stress-induced deterioration, yet practical strategies to recover germination capacity in aged seeds remain limited. This study aimed to quantify aging-induced losses in germination performance and to evaluate whether exogenous gibberellic acid (GA(3)) can partially restore seed vigor through physiological, biochemical, and hormonal regulation. Fresh seeds (FS), naturally aged (NA), and artificially aged (AA) seeds of four desert species (Salsola affinis C.A.Mey., Trigonella arcuata C.A.Mey., Ceratocarpus arenarius L., and Alyssum desertorum Stapf) were exposed to graded GA(3) concentrations (0-500 mg L-1). Germination indices (GP, GR, GI, VI), antioxidant enzymes (SOD, POD, CAT), lipid peroxidation (MDA), phytohormones (IAA, ABA, cytokinins), and multivariate trait relationships were assessed. Without GA(3), NA reduced germination potential by 22.8-33.6%, while AA caused more severe losses of 42.4-67.8%, depending on species. Germination rate declined by 15.7-32.5% under NA and 36.4-65.2% under AA. GA(3) application improved all germination indices up to 200 mg L-1 (GA200), which increased GP by 22.8-32.0% and vitality index by 17.0-28.5% compared with GA(0), whereas GA500 showed diminishing returns. Aging suppressed antioxidant enzymes by 15-20% (NA) and 30-45% (AA) and increased MDA by up to 50%, while GA200 enhanced SOD, POD, and CAT and reduced MDA by 8-18%. Aging also reduced IAA and cytokinins (similar to 28-50%) and increased ABA (27.7-77.4%), with GA200 partially restoring hormonal balance. In conclusion, GA(3) at an optimal dose (200 mg L-1) partially reverses aging-induced physiological and hormonal constraints, improving germination and vigor, although recovery remains limited under advanced deterioration.