Learn about the effect of artificial light on plant growth versus natural sunlight and delve into some biology and botany concepts in this science project.

What are the effects of colored light on plant growth? Explore plant behavior in this cool botany science fair project and learn about phototropism!

Examine the impact of insecticides on plant growth.

Check out this cool science project idea to explore how temperature creates annual rhythms that govern plant growth.

Students explore hot desert plant adaptations in this cool science fair project by observing how these organisms prevent excessive transpiration.

Compare animal and plant fats and observe, and record, and draw conclusions about their similarities and differences.

This fun science project helps to investigate how much water can a plant take up and release in a certain period of time through the process of transpiration.

Does putting soapy water on plants help or hinder plant growth? Kids learn about greywater and how it affects plant growth in this cool science fair project.

Wiggly worms are known for staying buried in the soil, but how does that affect plants? Are earthworms and plant growth related?

The goal of this middle school science fair project is to examine the effect of caffeine on plant growth.

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

This science fair project idea researches the effects of acid rain on plant growth.

How does light affect plant growth? Do different colors of light work better than others? Find out in this classic science fair project idea.

This science fair project explores how osmotic pressure forces water through the root up into the plant.

In this microwave plant experiment, find out whether microwave radiation will affect radish seed germination. Will it help or hinder the plants' growth?

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

Ethanol can be used as an alternative fuel! The purpose of this experiment is to identify a starch plant that produces the largest quantity of ethanol.

Culverts transport seeds away from their original location to different places. This science project examines the effect of culverts on plant growth in streams.

The purpose of this science project is to determine which stimulus, gravity or water, will cause the greatest growth response in a plant.

Find out whether putting something on top of a plant will inhibit its growth.

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

This science fair project idea explores whether talking to a plant will help it grow.

This science fair project idea explores plant growth from a bulb, root, and a stem and investigates asexual plant reproduction.

Water, along with soil and light, is a necessary component for plant growth. So what's better for promoting plant growth: tap water, or rain water?

The project investigates the affect music has on plant growth while experimenting with rock, classical and no music.

In this science fair project, students examine how the flow rate in a stream affects the growth of aquatic plants.

This science project teaches students about organic farming and the benefits and disadvantages of commercial plant food.

Do you think you could walk around upside down -- with your feet in the air and your head on the ground?

Free science fair project idea examining how different types of water affect plant germination and growth.

Determine if certain colors of light are more effective for photosynthesis. Plant seeds in cardboard boxes with different light, record visible growth.