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Soil Pollution Science Fair Project

Hydroponics vs. Soil Growth

Hydroponics vs. Soil Growth | Science Fair Projects | STEM Projects
Are you curious to know which environment is better for plant growth? Compare the growth of a Peperomia plant in soil and in hydroponics to find out!


The hypothesis is that the Peperomia plant’s roots grow faster in hydroponics solution than in soil.

Method & Materials

You will cut 10 pieces of the Peperomia plant stem into 8 cm lengths, label 5 plastic containers “soil 1” to “soil 5” and 5 plastic containers “hydro 1” to “hydro 5”, make 3 holes at the bottom of the plastic containers marked “soil 1” to “soil 5”, fill these containers with soil, plant 1 Peperomia plant stem in each of the container, mix the hydroponics plant nutrient is with water according to the instructions stated on the packaging, pour the mixture into the plastic containers marked “hydro 1” to “hydro 5”, place 1 Peperomia plant stem in each of the container, and place the 10 plastic containers at a place where there is adequate sunlight.
You will need 1 Peperomia plant, 10 plastic containers, 5 plastic containers filled with soil, 1 bottle of hydroponic plant food, 1 pair of scissors, tap water, 1 ruler, and 1 black marker pen.


After 3 weeks, the roots of the Peperomia plants in the hydroponics solution were longer, compared with the ones planted in soil.

Why do this project?

This science project is interesting because it shows how hydroponics can be used to grow plants in places with insufficient arable land, and how it can produce a higher crop yield and be carried out all year round.

Also Consider

Variations of this science project include using different types of plants and different types of nutrient solutions to see if they affect the rate of growth of the roots.

Full project details

You can find additional information and details for this science fair project here. Have fun exploring!

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