braided princess crown or necklace from flowers.

Step 5 How do I stop?

This is the trickiest part, but once you have done it 2 or 3 times it is easy.  You need to take the stem ends you have and weave them into the starting end of the crown.  Pick one stem at a time and follow one of the stems at the start, tucking it through all the holes the starting stem goes through.  When done right, you will not be able to tell where the splice is.