The PHorestAll project kick-off meeting took place from 25–27 June in Białystok, Poland, bringing together partners from various European institutions and organizations. Over the three-day event, participants introduced their expertise, presented the project’s objectives, work packages, and planned activities, and discussed expected outcomes. Special emphasis was placed on knowledge exchange regarding different forest ecosystems and research approaches, complemented by a field visit to local institutions and the Białystok University campus. The meeting provided an excellent opportunity to strengthen collaboration and establish a shared vision for the successful implementation of the project.