Phil Pascoe
Established Member
Also Chile Pine.
Ph of the soilNo one guess why the Hydrangea is half blue and half red?
Are you not familiar with Litmus paper?But why half red and half blue?
As I said: The pH of the soil is different on each side of the plant - Lime wash will raise the pH making it less acidic. Anything above 7 (neutral) will cause the flowers to become more red.It's a Flint Stone cottage with lime joints, due to the amount of rain we have had this has leeched out of the wall around the Hydrangea from two sides on the blue side of the plant, well that's my theory.
When you first posted the question, I assumed that you knew the answer which is why I didn't respond immediately. It was only when you re-asked that I did - but still thought that you new. It now seems that you really didn't know and really would like an answer.Interesting except its the blue side that gets the Lime wash, but then the house is on Chalk, no foundations just built off the Chalk.
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