Search for Science Fair Projects

1000 Science Fair Projects with Complete Instructions

Botany Science Fair Project

How Soil Affects Pinto Bean Growth

How Soil Affects Pinto Bean Growth | Science Fair Projects | STEM Projects
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.

Full project details

You can find additional information and details for this science fair 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.
Share this Science Project:

Related Science Fair Project Ideas

Frozen Flower Sensory Play
Watch ice melt and flowers bloom in this hands-on science activity for kids!
Plant Growth in and Out of Greenhouses
Let's find out if plants grow bigger in a greenhouse or without protection!
Changing the Color of Flowers
Did you know you can change the color of flowers? With this science experiment, you can!
Share this Science Project: