Hairstyle Designs For Bridesmaid

Just ask them to add a sunflower to their hair.
Imagine 6-7 girls with big sunflowers. It will surely stand out.

I can't stop gushing over no. 6

https://www.weddingwire.in/wedding-tips/amazing-hairstyles--c8157

I think for bridesmaids the easiest and most cohesive would be a messy bun or ponytail

My personal favourite is to wear my hair down. It works for almost every hair length and wavelength and is, therefore, the safest bet