How do hydrangeas get their color?

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Cooperative Extension
Address: 115 W Main St, Lincolnton, NC 28092
Phone: (704) 736-8452

Contact your local county extension office for details, but I was told that it has to do with the level of ph in your soil. I bought one years ago because it was white and after transplanting it became a light blue.

Mandy

April 20, 20070 found this helpful

I think I read somewhere that they get their color based on how acidic the soil is. If the soil is more acidic, the flowers are more pink in color. If it's more basic they are more purple in color.