Officials assigned the trees ID numbers and email addresses in 2013 as part of a program designed to make it easier for citizens to report problems like dangerous branches. The “unintended but positive consequence,” as the chair of Melbourne’s Environment Portfolio, Councillor Arron Wood, put it to me in an email, was that people did more than just report issues. They also wrote directly to the trees, which have received thousands of messages—everything from banal greetings and questions about current events to love letters and existential dilemmas.

“The email interactions reveal the love Melburnians have for our trees,” Wood said. City officials shared several of the tree emails with me, but redacted the names of senders to respect their privacy.