... I expect my bridesmaids to have had their hair cut fairly recently on the wedding day?
One of my bridesmaids has been cutting her own hair for 15 years and it looks awful (all different lengths and straggly). She thinks it's unreasonable for me to expect her to have it trimmed so it looks nice sometime between now and the wedding (three weeks). She seems to think that the hairdresser can cut it on the day (and I can of course pay for it as I'm paying the hairdresser).
If I was a bridesmaid I would expect to do the bare minimum (eg have my hair cut, wax my legs and underarms, keep my skin in decent condition).