BackgroundThe COVID-19 pandemic created major challenges in long-term care (LTC) homes across Canada and globally. A nurse practitioner-led interdisciplinary huddle intervention was developed to support staff wellbeing in two LTC homes in Ontario, Canada. The objective of this study was to identify the constructs strongly influencing the process of implementation of huddles across both sites, capturing the overall barriers and facilitators and the intervention’s intrinsic properties.MethodsNineteen participants were interviewed about their experiences, pre-, post-, and during huddle implementation. The Consolidated Framework for Implementation Research (CFIR) was used to guide data collection and analysis. CFIR rating rules and a cross-comparison analysis was used to identify differentiating factors between sites. A novel extension to the CFIR analysis process was designed to assess commonly influential factors across both sites.ResultsNineteen of twenty selected CFIR constructs were coded in interviews from both sites. Five constructs were determined to be strongly influential across both implementation sites and a detailed description is provided: evidence strength and quality; needs and resources of those served by the organization; leadership engagement; relative priority; and champions. A summary of ratings and an illustrative quote are provided for each construct.ConclusionSuccessful huddles require long-term care leaders to consider their involvement, the inclusion all team members to help build relationships and foster cohesion, and the integration of nurse practitioners as full-time staff members within LTC homes to support staff and facilitate initiatives for wellbeing. This research provides an example of a novel approach using the CFIR methodology, extending its use to identify significant factors for implementation when it is not possible to compare differences in success.Supplementary InformationThe online version contains supplementary material available at 10.1186/s12912-023-01354-1.