Celery Experiment

Has your child ever wondered how plants get water from their roots all the way to their leaves? This simple celery experiment shows how colored water travels up a celery stalk!

  1. Ages: 3 - 8

  2. 1 hour - 2 hours

  3. Messy

  4. Grownup needed

Step-by-step tutorial

  • Learn moreMagnifying graphic

    You’ve just watered a thirsty plant, and its roots are starting to absorb the water from the soil. But how does the water travel from the roots to the rest of the plant? The answer is tiny tubes inside the stem called the xylem. They draw the water up from the roots like a straw by a process called capillary action.Capillary action is what happens when water climbs up things like small tubes. Water can do this because it’s sticky! Not sticky like glue, but sticky like the droplets that stick to your fingers after you wash your hands. Water sticks to the walls of a tube and starts to inch upward. It also sticks to itself, so it pulls more water after it as it climbs. Gradually, capillary action lets water climb up to all the different parts of a plant through the xylem tubes in the stem. Check out this project to see capillary action at work through a celery’s xylem!

  • Step 1

    Gather your materials. p.p1 {margin: 0.0px 0.0px 12.0px 0.0px; line-height: 14.0px; font: 14.0px Times; color: #000000; -webkit-text-stroke: #000000} span.s1 {font-kerning: none}

    Photo reference of how to complete step 1

  • Step 2

    p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; line-height: 14.0px; font: 14.0px Times; color: #000000; -webkit-text-stroke: #000000} span.s1 {font-kerning: none} Cut about one inch off the bottom of four celery stalks.

    Photo reference of how to complete step 2

  • Step 3

    Fill each jar about halfway with water. Then, drip a few drops of food coloring into each glass. p.p1 {margin: 0.0px 0.0px 12.0px 0.0px; line-height: 14.0px; font: 14.0px Times; color: #000000; -webkit-text-stroke: #000000} span.s1 {font-kerning: none}

    Photo reference of how to complete step 3

  • Step 4

    Stick the celery stalks in the colored water and let them sit for about 20 minutes. p.p1 {margin: 0.0px 0.0px 12.0px 0.0px; line-height: 14.0px; font: 14.0px Times; color: #000000; -webkit-text-stroke: #000000} span.s1 {font-kerning: none}

    Photo reference of how to complete step 4

  • Photo reference of how to complete step 6

    Tip

    Rip open 1 or 2 of the celery stalks to better see how the color travels through the stalks.

  • Step 5

    Come back to the celery after 20 minutes and check out the stalks! What do you see? Color should start to appear in little dots on the ends of them! p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; line-height: 14.0px; font: 14.0px Times; color: #000000; -webkit-text-stroke: #000000; min-height: 18.0px} p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; line-height: 14.0px; font: 14.0px Times; color: #000000; -webkit-text-stroke: #000000} span.s1 {font-kerning: none}

    Photo reference of how to complete step 5

  • Learn moreMagnifying graphic

    Leave the celery overnight and return to it in the morning to see if the colors have reached the leafy green celery tops! Leaves help pull water up the xylem. They have little holes that let out extra water the plant is done using, so more water can come rushing up. Try comparing a celery stalk with leaves to one without — which gets color up to the top first?

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