Haryana's agricultural sector faces intersecting crises of climate variability, groundwater depletion, and the need to shift away from ecologically intensive rice-wheat monoculture. Green banking the practice of designing financial products and lending policies to incentivise environmentally sustainable behaviour offers a potentially transformative instrument for financing this transition. Yet the empirical evidence base linking green banking instruments specifically to the adoption of climate-resilient agricultural practices (CRAPs) in Haryana remains limited and methodologically dispersed. This thematic systematic review conducted out of 312 initial records, 22 studies passed sequential deduplication, title-abstract screening, and full-text eligibility assessment. Thematic analysis organises the evidence under five interconnected themes: (A) green banking concepts and India's regulatory context; (B) agricultural finance, credit access, and CRAP adoption in India; (C) comparative evidence from green finance and agricultural sustainability in China and South Asia; (D) Haryana's groundwater and climate stress as a structural adoption driver; and (E) policy instruments, barriers, and finance architecture. Across these themes, the evidence converges on three central findings. First, credit access particularly its terms rather than mere availability are among the strongest predictors of CRAP adoption in India, with credit-constrained households being 2.7 times less likely to adopt improved technologies (Birthal et al., 2015). Second, Indian banks, including those operating in Haryana, have made substantive green commitments at the institutional level but have not systematically designed these into smallholder-accessible agricultural products. Third, in contexts where green banking has been operationalised with genuine product differentiation as in Bangladesh's solar irrigation refinancing and China's green credit guidelines measurable reductions in environmentally harmful agricultural practices follow. The review concludes with evidence-grounded thematic policy implications for Haryana and closes by mapping five specific knowledge gaps that constitute the agenda for primary research in this domain.