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

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

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

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

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

This science fair project idea investigates whether plants can survive being frozen.

This science fair project idea determines if the color of light affects the growth of plants.

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

Can you plant the insect-attracting borage plant to increase the amount of beneficial insects in your garden? Find out in this experiment!

Climates with more snowfall have more coniferous forests and fewer deciduous ? Learn about how pine trees in a coniferous forest adapted to withstand snow.

Explore if planting seeds in a certain direction will affect how fast it germinates.

This science project teaches students the relationship between compost and plant growth. Students conduct an experiment with different types of compost.

In this experiment, kids will see if pruning tomato plants makes them more fruitful and learn about the factors that contribute to a plant's fruit production.

Science fair project that determines whether landscaping fabric impacts the ability of plants to receive water.

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.

Make your own greenhouse - out of a balloon! Your child will learn how greenhouses work as they plant radish seeds and watch them grow.

This science fair project idea demonstrates that plants give off water.

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

Why do plants wilt? Kids will learn to think critically about what environmental factors affect plants, and what plants need to survive.

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

Plants and light seem to be good buddies, but how far does the friendship really go?

Do you think heat can affect a plant's growth rate?

Test whether plants can grow without sunlight and water.

In this science project, learn about water transport in plants and make a beautiful dyed floral arrangement with cohesion, adhesion, and xylem tubes!