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Botany Science Fair Project

Salt Water and Plant Growth

Salt Water and Plant Growth | Science Fair Projects | STEM Projects
In this experiment, we'll be testing how different concentrations of salt water affect plant growth. We'll measure the plants' growth each day to see which concentration has the worst effect.


The hypothesis is that the largest concentration of salt will harm the plants the most.

Method & Materials

You will purchase plants, prepare the water with salt concentrations, and water the plants each day with the different concentrations of salt.
You will need plants, salt, and water.


The results showed that the 8 and 6 ounce salt water concentrations harmed the plant growth the most. The water did not harm the growth and showed no visual effects on the plants.

Why do this project?

This science project is interesting because it shows how salt water can affect the growth of plants, which is something that is not often considered.

Also Consider

Variations to consider include testing the effect of man-made salt water and ocean water on plants, or testing the effect of different types of salt on plant growth.

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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