<p>The endangered Himalayan orchid, <i>Esmeralda clarkei</i> Rchb. f., faces critical population decline due to habitat loss and overexploitation, necessitating the development of robust and efficient conservation protocols. This study details an integrated in vitro propagation strategy focusing on optimizing every developmental stage from seed to established plantlet, coupled with molecular validation. Asymbiotic germination was critically dependent on seed maturity, with the highest rate (88.84%) achieved using 10 months after pollination (MAP) immature seeds. Optimal medium consisted of half-strength MS medium supplemented with 3% sucrose and 0.5% Activated Charcoal (AC), which significantly accelerated the process by mitigating phenolic exudation and reducing the germination time to approximately ~ 21 days. Subsequent plantlet development utilized BA + NAA (12 + 6 µML^− 1), yielding a high multiplication rate of up to ~ 10 shoots per explant. A major finding in the ex vitro stage was the use of a low-cost, alternative substratum: a Coconut Husk + Wood Bark (1:1) mixture. This combination proved superior for primary acclimatization, yielding an excellent 92.88% survival rate and providing an estimated 75% cost reduction compared to traditional agar-based methods. Finally, genetic fidelity was rigorously assessed using RAPD, DAMD, and SCoT markers, confirming the high genetic stability of the regenerants with an overall 96.33% monomorphism compared to the mother plant. This work provides a comprehensive, integrated in vitro propagation and conservation strategy for the endangered Himalayan orchid, <i>Esmeralda clarkei</i> Rchb. f.: from seed age optimization to molecular validation.</p>