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Hydroponics vs. soil growth Featured science projectScience project video


This science fair project aims to compare the rate of growth of the Peperomiplant a (radiator plant) grown hydroponically as opposed to being grown in soil. This is carried out by by measuring the length of the plantís roots.


The Peperomia plant’s roots grow faster in hydroponics solution than in soil.

Scientific Terms

Hydroponics, nutrients, pesticides



Hydroponics is the technique of growing plants in a nutrient solution instead of soil. Under normal conditions, the plant will obtain the required nutrients from soil. Water will help to dissolve the nutrients in the soil so that they can be absorbed via the plants’ roots . In hydroponics however,  nutrients are introduced directly to the plants’ roots through the nutrient solution.

There are various benefits reaped from growing plants  hydroponically -  there is no need for soil, the water can be recycled and the amount and type of nutrients required can be specifically controlled to suit the plant . This means that in places with insufficient arable land, vegetables and fruits may yet be grown in sufficient quantities. Hydroponics also produces a higher crop yield and can be carried out  all year round.

Disease control is also easier when plants are grown hydroponically They can be shifted away from contaminated areas. They are also free from soil borne diseases . Pesticide use is reduced, and furthermore, there is no risk of soil pollution due to the use of pesticides.

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Complexity level:
Project cost ($):
Time required:
1 day for preparation 21 days for observation
Material availability:
May be found at a nursery
Safety concerns:

Basic safety requirements