Sofia, the capital of Bulgaria, counts over 1.2 million residents. Seeking to increase its urban canopy cover, Sofia took part in the “Trees in Cities Challenge” pledging to plant 12,486 new trees. With its new urban forest, the city aims to increase its resilience to climate change and improve air quality. In 2020, over 22,000 new trees have been planted, 17,000 together with citizens and companies as part of Sofia’s initiative “New Forest of Sofia”. The city exceeded its pledge by more than 10,000 trees, planting them along streets and boulevards, in parks and courtyards of public institutions. To promote its planting activities, the city created a dedicated website and is reaching out to its residents through social media.