In the hydrangea "world" a pH of 7 is enough Alkaline for pink.
Nickpicker
"Stephen Henning" wrote in message
news
"Elaine" wrote:

http://www.flowersbulbs.com/manipulatecolor.cfm
Here is a reference for pH and coloring. I did have it backwards.
Sorry, thanks John.
pH of 4.5-----deep blue----acid
pH of 7.0----deep pink----alkaline

Actually a pH of 7 is neutral, perfectly neutral.
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