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Dyed Celery Experiment: Transpiration Demonstration

June 3, 2015 by Anna Ranson

Learn about how transpiration works in plants with this classic dyed celery experiment for kids! Dyed celery transpiration science experiment

This dyed celery experiment is a classic science demonstration that shows how plants use transpiration to suck up water. We really enjoyed this white carnation experiment a couple of years back and decided to repeat the same idea, this time using celery for comparison. The results were just as clear, but maybe not quite as pretty!

Materials needed:

empty glass jars

water

fresh celery stems with the leaves still attached

Wilton Gel Colourings [using this type of colouring is important as liquid dyes and weaker gel colours just don’t work as effectively.]

Transpiration experiment set up

Fill the glass jars 1/3 full of water and then add 1 tsp of the Wilton gel colour to each one. We found the darker colours worked the best, but you can of course experiment and try all of them! It would be a good discussion to hypothesise why some colours may work better than others.

Cut your celery stems on a diagonal to allow the greatest possible surface area for the coloured water to pass through (like when cutting fresh flower stems to put into a vase.)

Then simply place them into the jars of dyed water and either take photographs or make observational drawings of their appearance straight away. This time we took photos, in our last experiment we made drawings which you can see here.

Celery transpiration

The dye starts to travel very quickly, and within half an hour we could already see colours moving up the stems.

Dyed celery science experiment

Within 24 hours the leaves had all been well reached and dyed due to the water reaching them. The girls noted that they could see the clear lines going up the stems and guessed these were to main channels for the water reaching the leaves above.

We took more photos to note the changes that had taken place. The green and blue dyes were the most effective, although the red was also clearly visible too.Dyed celery experiment

This is such a lovely, visual demonstration that even the youngest child can take part and be wowed by it. Older kids can do this for science projects as an easily manageable piece of independent research, with the next step being to find out how it works and why, perhaps comparing it to other flowers and/or vegetables too.

What they are learning as they play:

science: thinking, hypothesising, making comparisons, understanding how water moves through a plant

See all of our other  SCIENCE ACTIVITIES for preschoolers and school age kids.

Follow my SCIENCE & DISCOVERY PLAY pinboard on Pinterest for loads more from around the web!
Follow Anna @ The Imagination Tree’s board Science and Discovery Play on Pinterest.

[This post contains affiliate links to Amazon. Thank you for your support!]

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Filed Under: Age, Colours, Discovery, Learn, Leaves, Nature, Plants, Play, Preschooler, School Age, Science Tagged With: Knowledge and Understanding of the World, Playful Science, Science

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About The Imagination Tree Hello and welcome! I'm Anna, Mama of 4, early years teacher and play enthusiast from the UK! Click here to read more about me.

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