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Botany Science Fair Project

Plant Height: Soil vs. Hydroponics

Plant Height: Soil vs. Hydroponics | Science Fair Projects | STEM Projects
Let's explore the differences between plants grown in soil and hydroponically. We'll measure the height of the plants to see which method produces the tallest plants.


The hypothesis is that the plants grown using hydroponics will grow taller than in soil.

Method & Materials

You will germinate seeds, set up a water culture system, a flood and drain system, and a soil system.
You will need a grow light, drill, large tubs, rubber stoppers, tubes, bottle, air pump, nutrient solution, potting soil, machinery cloth, wood shavings, spray bottle, ruler, bubble rock, tubing connectors, top loading balance, paper towels, plates, and well water.


The results indicate that the hypothesis should be rejected because the soil plants grew the tallest. The average height of the soil plants was 5.75 cm, flood and drain plants was 3 cm and water culture plants was 2.5 cm.

Why do this project?

This science project is interesting because it explores the differences between plants grown in soil and hydroponically.

Also Consider

Variations to consider include using different types of soil, different types of hydroponic systems, and different types of plants.

Full project details

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

Related video

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