Question: when a flower is drinking coloured water why does it's petals turn that colour?

Rebecca Jones answered on 24 Jun 2015:

This is a really neat and easy experiment to do and produces some lovely flowers at the end! What you’re basically doing is looking at how water travels up the xylem through a process called cohesion. By dying the water you can examine how fast the water travels up and because this is normally done on a white or cream flower it often takes up the dye and turns that colour too. You could even split the stem in half and put them in different coloured dyes to get different effects!