On a farm in Wick near Pershore England, I heard many years ago about some fields of flowers, being grown for their dried petals for use in confetti. Before they became well known and a major tourist attraction one had to wander the countryside looking for them because they moved location every year. The best week to go varies every year according to weather.
The petals are picked by hand by a special method and then dried and sorted. They are picked according to colour. It is just the petals that are harvested not the whole flower.
Hear is a collection of my photos taken at Wick in three different years.