How to change the starting directory of a tmux session?

Question

The directory where you start a tmux session in will be the directory that all new windows will start at.

My question is, how can you change this starting directory wit

Answer 1

Chucksmash's answer is a good one, but it can also be achieved without using the session if you like. The command attach-session is also available in the tmux command prompt; and the target session can be specified as the "current" session using a dot.

attach-session -t . -c /path/to/new/directory