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Botany Science Fair Project

How Soil Affects Pinto Bean Growth

Science fair project - How Soil Affects Pinto Bean Growth
We're going to explore how different soils affect the growth of a pinto bean. We'll measure the growth of the beans over a six-week period to see which soil produces the best results.


The hypothesis is that cotton will increase the growth of a pinto bean the most.

Method & Materials

You will label cups with different types of soil, plant pinto beans in each cup, and measure the growth of the beans over a six-week period.
You will need foam cups, pinto beans, potting soil, regular soil, blended soil, cotton balls, a permanent marker, measuring cups, and water.


The results indicate that cotton was the best material for the pinto bean to grow in. This stands out because it was unexpected, as the other soils were expected to produce better results.

Why do this project?

This science project is interesting because it shows how different materials can affect the growth of a plant.

Also Consider

Variations to consider include using different types of beans, different types of soil, and different amounts of water.

Learn more

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

Related videos

Hey there! Here are some awesome videos about this science project that we think you'll really like. They're not only super fun, but they'll also help you learn more about the science behind the project. So sit back, relax, and get ready to have some fun!!
This is an easy variation using ziplock bags to grow beans! You can use cotton, paper towel and different soils!
In this video, you learn how to grow beans using cotton balls and a ziplock bag.
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