What a hell man? You need to put it in a girl's (or granny's :( ) stockings. It's never gonna stay in place like this. And you put few pots with several colours and you put lukowitze eggs in all of them (one by one)
After wrapping in onion skins wrap the eggs in small cotton rags. Add 1/4 cup vinegar to the pot of water. We use rubber bands instead of thread. After removing from the boiling water rinse under cool water before unbundling or you will get burned. We use onion skins every year but have never tried flowers. My father's grandparents that emigrated from Germany taught him how to do this when he was young.
Still a beautiful idea :)