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The materials required for this science fair project:
- 1 packet of radish seeds
- 15 plastic pots
- Soil required for  15 pots
- Hasta Gro fertilizer
- Tap water
- Ruler (1 meter)
- 5 plastic containers
- 1 measuring cup


1. For this science fair project, the independent variable is the concentration of fertilizer in the water. The dependent variable is the rate of growth of the radish plants. This is determined by measuring the average height of the 3 plants in each group. The constants (control variables) are the amount of water  and the type of plant used.

2. The 15 pots are filled with the same amount of soil. One radish seed is placed in each pot. (More than one radish seed can be used in each pot in case some of the seeds do not germinate. Once they start to geminate, remove the unwanted plants from the pot)

3. The pots are divided into 5 groups with 3 plants in each group. They are labeled as groups A, B, C, D and E respectively. The pots are watered twice a day according to the concentration recommended below.

a. Group A plants are watered using 33% of the recommended concentration of fertilizer

b. Group B plants are watered using 66% of the recommended concentration of fertilizer

c. Group C plants are watered using 100% of the recommended concentration of fertilizer

d. Group D plants are watered using 133% of the recommended concentration of fertilizer

e. Group E plants are watered using 166% of the recommended concentration of fertilizer

4. The height of the plants is measured on the tenth day and the average is calculated for each group.

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Complexity level:
Project cost ($):
Time required:
1 day to prepare, 10 days for the science project experiment
Material availability:
Easily found at a plant nursery
Safety concerns:

Basic safety requirements