The Green Fund for Warsaw (Zielony Fundusz dla Warszawy) is a financing mechanism launched in 2021 in the city of Warsaw (Poland) for funding green urban spaces. The fund allows private companies to support existing greening initiatives in the city (e.g. "Million trees for Warsaw"), "adopt" an existing green space in the city, and cover the cost of its maintenance or fund their own project ideas to increase the number of green spaces in the city, improve the quality and increase the biodiversity. To date, the fund has attracted over 15 major corporate sponsors and enabled the creation of a new pocket park as well as to plant a variety of trees, bushes and pollinator meadows across the city. The fund supports implementation of AdaptCity - Warsaw's climate adaptation strategy.