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Botany Science Fair Project

Does Seed Size Affect Germination?

Does Seed Size Affect Germination? | Science Fair Projects | STEM Projects
Let's explore how the size of a seed affects its germination rate. We'll use kidney beans to see if bigger seeds germinate faster than smaller ones.


The hypothesis is that bigger seeds will have a higher percentage rate of germination.

Method & Materials

You will separate the beans into small, medium, and large sizes, place them on damp paper towels, wrap them in Saran wrap, and place them in plastic cups with water.
You will need 15 plastic cups, 30 paper towels, 300 kidney beans, 30 250oz tap water, and 15 pieces of Saran Wrap.


The results indicate that bigger bean seeds germinate faster than smaller bean seeds and medium bean seeds. The percentage of the beans that germinated in the "large" trial was 90%, "medium" was 88%, and "small" was 86%.

Why do this project?

This science project is interesting because it can help farmers select seeds that germinate faster, which is especially useful in places with short growing seasons.

Also Consider

Variations to consider include using different types of plants, such as other bean seeds, and different sizes, such as 0.4g, 0.6g, and 0.8g.

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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