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Effect of fertilizer on plant growthFeatured science projectScience project video

Conclusion

The hypothesis that watering  plants with  too little  or too much fertilizer will slow down  plant growth is proven to be true.

Using the correct amounts of fertilizer is important to optimize the yield of the garden or the farms. Sometimes continual use of fertilizer will cause nutrients and salt to accumulate in the soil over a period of time. Therefore, using fertilizers once a week instead of daily or having the soil tested may be recommended to improve the yield and protect the crops.

Also consider

What would happen if the experiment was repeated using different types of plants like bamboo or beans?

The experiment can be repeated using different brands of fertilizer.
 

References

A great alternative to chemical fertilizers – Hasta Gro organic food plant - http://www.epinions.com/review/Hasta_Gro_POrganic_Plant_Food_Gallon/content_44027628436

How do the amounts of fertilizer affect plant growth? - http://www.madsci.org/posts/archives/2002-04/1019088560.Bt.r.html
 

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Complexity level:
7
Project cost ($):
25
Time required:
1 day to prepare, 10 days for observation
Material availability:
1 day to prepare, 10 days for observation
Safety concerns:

Some fertilizers react to solvents - perform the experiment in a well ventilated place and add the fertilizer slowly.