::: colouring plants
It is always fascinating to see how plants draw water up from their roots right up to their leaves at the top – even the tallest trees do this! A really simple way to demonstrate to children how this works is to do the old favourite – the coloured celery!
Pop several pieces of celery into jars filled with coloured water.
After an hour remove one piece from the water and see how far up the stalk the water has gone. Remove the other pieces at various intervals over the session to see how far up the celery the water has been drawn.
White flowers such as daisies, carnations or roses can also be used to demonstrate this and the result is really beautiful. Fill a few jars with different coloured water and add a white flower to each. It is beautiful to see them slowly changing colour as the water is absorbed through their stems.
We discovered that we can create multi-coloured flowers too. Fill 2 jars with different coloured water. Carefully cut the stems of a white flower in half lengthways to about halfway up. The stem should remain whole at the top. Place half the stem of one flower in one jar and the other half in the next jar. The fl petals will become two different colours as the different colours are absorbed up the stem of the flower!
Fascinating! We feel we have discovered a florist’s secret!