Do you have a bridesmaids facebook group that you send messages to? Text them/call them individually? How soon did you start communicating with them about wedding things? Now that it is officially wedding year, I'm starting to think about these things more!
There are a couple of girls that I am in constant contact with about the wedding (they are excited to help plan) and we talk almost everyday. However, there are some that I don't need/want to bug about the wedding. When did you start messaging them to coordinate things? Did you do it as a group?