In 2012 the biology department of Virginia Military Institute (VMI), Lexington, VA, found that if one were to add a certain amount of molybdenum (atomic number 42 on the periodic table) to the soil he/she would have an orange hydrangea.
Molybdenum, of all things, was found on Roy Roger's ranch in the 1939 film "Wall Street Cowboy."
The writer has an old box-end wrench with two words on it: "aluminum molybdenum". The metal molybdenum is used in many metal objects to give them strength, etc. It was once confused with lead.
The hydrangea receives its name from the Greek word for water---hydro. It requires considerable water.
Madonna, the entertainer with only one name, has stated that she "loathes hydrangeas."