Hydrangea macrophylla, also known as "bigleaf," French," or "mop head" hydrangeas, are the most common and have blue ...

Hydrangea macrophylla is commonly called the mophead type, and their flowers are what most gardeners long for: “People lust after those big blue flowers that we go gaga about and people don’t ...

Changing your hydrangea flowers to blue, pink or purple isn't a magic trick. It's a doable science experiment.