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Effect of water hardness on seed germinationFeatured science projectScience project video

Conclusion

The hypothesis that watering plants with soft water will help seeds germinate more quickly, is proven to be false.

Water hardness is however, very important for the survival of fish and other aquatic life. The calcium diluted in the water can be absorbed by the fish for bone formation, metabolism and blood clots. The presence of calcium or other minerals in the water also helps in preventing the loss of important minerals like sodium or potassium from the fish’s body fluids.

Also consider

This science fair project may be repeated, this time, with different types of plants like marigold or radish seeds?

Modify the science project experiment, using different environments like placing them under the sun, in a shaded area or indoors.

References

How to water plants - http://home.howstuffworks.com/how-to-water-plants.htm

Water softening - http://en.wikipedia.org/wiki/Water_softening

Understanding water hardness -http://www.cauky.edu/wkrec/Hardness.htm

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Complexity level:
6
Project cost ($):
30
Time required:
1 day to prepare, 5 days for the science project experiment
Material availability:
Easily found
Safety concerns:

Basic safety requirements