>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
>pH?
>
It is hydrangeas, although the basis for the color is a little more
involved than soil pH. The blue color results from a complex of aluminum
ions with (I think) anthocyanins, although I'm not sure that I am
remembering the pigment correctly. Fertilizing with aluminum sulfate is
supposed to help keep the flowers blue. Hope that helps.
Frank
_______________________________________________________________
Frank Percival |
Biology Department | phone: (805)565-6119
Westmont College | fax: (805)565-7035
955 La Paz Rd. | email: perciva at westmont.edu
Santa Barbara, CA 93108 |
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