Background: Since workforce shortages are increasing, collaboration between care recipients, their significant others and care professionals (triad) should intensify to guarantee person-centred care1. Such care, that aligns with personal preferences, needs and values, requires saliency and sharing of tacit knowledge of parties involved2. This study (2022, 2024) explored 1. how saliency based on tacit knowledge for the personhood of a care recipient informs person-centred responding of care professionals and 2. how a person-centred learning culture can be fostered in which tacit knowledge is shared in triads.  Methods: Both study-phases took place on residential wards for people with dementia and somatic care. Narratives of successful examples and best practices of using tacit knowledge were collected via observations and interviews. Based on these insights and in co-creation with all stakeholders, an innovative tool was developed which consists of  a seasonal calendar and card game, enriched with eight elaborated practical examples. The tool facilitates dialogue and reflection, enhances saliency and encourages using  tacit knowledge in daily life-experiences of residents. Results: Findings show that saliency informed by tacit knowledge often leads to person-centred care. Nevertheless, chances for sharing tacit knowledge in a triad are missed due to prevailing task-oriented routines. The study highlights the importance of a continuous dialogue on values and priorities, and the need for reflection-in-action and on-action. The knowledge gained and the tool increases awareness and engagement, although a sustainable organisational embedding remains a challenge. Conclusion: Saliency and using tacit knowledge of parties cooperating in a triad are  essential for person-centred care. Facilitating dialogue and reflection strengthens such collaboration. Concrete examples of best practices and narratives of successful communication supports a person-centred learning climate.