I've never heard of dyeing flowers Al...had a google and there's plenty info on there, the piece i read they used food colouring in the vase and over a few days the flowers suck up the dye and the petals change colour. Thinking about it, i read somewhere that you could put something in the soil around a hydrangea and that would change the colour of the flower. I can't remember what it was though
Thanks for the compliments on the photo But I'm afraid the only thing i do is point and press. The camera that did the work is an Acer CI 6330, they cost around £100, i just used the close up set