I love flowers and I love necklaces, so to have a flower necklace is such a happy maker for me.  when I was a child, my mother taught me how to make flower necklaces with the flowers in our yard.
   1. find several flowers, with a medium to long stem.
   2. take two of them, tie one of the stems around the other.
   3.  take another flower and tie it's stem around the stem of the one you tied in step 2
   4. repeat step 3 until you get the strand long enough, then tie the last stem around the first and tadaaa, a flower necklace
  
   It's easy and cost nothing other then your time and you can use almost any kind of flower or flowers.