To connect to Grow using FTP, you need to have:
This is your FTP server username and password, not your Grow username and password.
The port is usually 21, but host and port depend on how your FTP server is configured. The port for SFTP is usually 22.
In order to use FTP, you will also need to whitelist Grow's IP addresses. You can find that information on our help article here.
If you have any questions please chat in and let us know.