When Do I order the Flowergirl dress?

I would order it a few months before the wedding. (find out how long it will take from the place you are ordering from and caluculate backwards- add about a month or two to their estimate).

We ordered the FGs' dresses in the beginning of March for my October wedding. They are being made to coordinate with the BMs' dresses and needed to be the same dye lot. Our place worked with the FGs' mother on the size.