p--and--t
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- Sep 28, 2008
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You beat me to it re: soil ....... but just for info, we have/had a white one, and using coffee grounds (Waitrose leave them in a bin outside the store!) we've changed it to pink.
When I lived in Adelaide hills and planted azaleas I used azalea food in the soil and sprinkled it around alternate hydrangea bushes and ended up with a mixture of red and blue hydrangea bushes depending on where I put the fertiliser.