I'm going to a wedding in France and I've no idea what to wear! If any of you know what the French wear to weddings please help me 
This is what I know...
It's in the countryside (not Paris)
There is no dress code (I'm sure this is not true, it's just not a published one)
I've been encouraged to wear "colour and flowers"
Apparently some of the (French) guests will probably wear fascinators
The cocktails are on grass so I've been told to avoid heels (no heels but fascinators...???)
Help!