acid/base indicator plants

Jon Greenberg jongreen at BLUEMARBLE.NET
Tue Nov 10 16:43:39 EST 1998

Can someone please refresh my memory about this? I have two questions?

1) Is it hydrangeas that produce red or blue flowers according to soil

2) What are the acid and base colors? My intuition is red flowers in
acid soil, and blue in neutralor alkaline, based on other inidicator
dyes, such as the ones (presuambly anthocyanins) in blueberries, red
cabbage, etc.

Many thanks,

Jon Greenberg

Jon Greenberg, Ph.D.            Curriculum Development
Science Education Consultant    Program Evaluation
812-330-8669			Preservice & Inservice Teacher Education
mailto:jongreen at

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