Same here RustyLady I've often wondered about the blue & white thing too - maybe the blue paint is the most durable colour & the others wear off/fade? Or it was the most popular at the time our allotments were established?

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Sarah

http://wixypixies.blogspot.com/

“Tell me one last thing,” said Harry. “Is this real? Or has this been happening inside my head?”
“Of course it is happening inside your head, Harry, but why on earth should that mean that it is not real?”