The thing about wearing flowers in your hair is that you can be as versatile as you want. But there are limitations and places on your head where you shouldn't wear flowers.
Here are some do's and don'ts
Do wear one or more flower on the side. Notice I said one or more. This means you don't have to wear just one flower on the side .But make sure you don't over do it.
Don't wear more than 3 small flowers on one side. In my opinion, you shouldn't wear more than 3. If you must wear more than 3, try spreading them out like a headband of flowers.
Do wear a flower close to the top of your head in an updo.
Don't wear it near the center of the front of your head or anywhere near your forehead.
Do wear large flowers in your hair. Especially toward the back of your hair, in an updo.
Don't wear them TOO large and too close to your face.
Wearing them closer to your face, in my opinion, is too distracting for every day wear. Unless, you are part of some sort of a show, or photo shoot, keep a larger flower away from your beautiful face.