Question: What will happen to celery if it is left to stand in coloured water overnight?
All you need is some celery with the leaves still attached, some water in a tall, clear vase or jar, and some food colouring. Red and blue were suggested in our book so each of the kidlets chose a colour and we tried them both. Have to tell you, definitely go with the blue. Much better results. Also, I’m pretty sure that water-based food colouring is best here.
We didn’t get much by way of results after leaving our celery for 12 hours so we cut the ends and left the celery for another day or so. This worked much better and we finally got to see the colour on the leaves, some spots on the stalks, and of course, at both cut ends where the main capillaries are.