How different concentrations of fertilizers affect the growth of a plant. The experiment started on 12/3/14. Introduction/Research: From my knowledge I know that fertilizers are used on plants to help them grow faster, bigger and greener. Overfertilizing a plant usually leads to the death of the plant or causes it to grow slower and shorter, while applying too little fertilizer will prevent the plant from growing to its full potential. From research I discovered that to help a plant grow it needs certain chemicals. The most important chemicals to help a plant grow are potassium, phosphorus, and nitrogen; these chemicals are usually found in most fertilizers. Purpose: To find out what happens to the growth of a plant when different concentrations of the recommended amount of fertilizer are used. on plants. Hypothesis: As the amount of fertilizer used to water the plant over the recommended amount increases or decreases, plant growth will slow making the height of the plant after the 15 day period shorter than the growth of the plant that was watered with the recommended amount of fertilizer. This is because watering the plant with too much or too little fertilizer will slow or fail to increase the rate of growth because using too much or too little fertilizer slows down the growth of the plant because the plants are given too much or too little nutrients and chemicals and, if administered in the right quantities, these chemicals help the plant grow faster and taller. Variables: Independent variable: The concentration of fertilizer in the water is below and above the recommended amount. Using more or less fertilizer than recommended will change this amount... half of the paper... 0ml of water twice a day, so that the plant receives 100ml of water per day. Spray the plant once in the morning and once in the evening. Repeat this process for each plant pot.4. Repeat step 3 for 15 days until results are recorded.5. On the second day arrange the 15 plant pots into 5 groups with three in each group, label the plant groups, group 1,2,3,4 and group 5 with the amount of fertilizer used for each plant group as shown below . Water the 3 plants in group 1 with 30% of the recommended amount of fertilizer. Water the 3 plants in group 2 with 60% of the recommended amount of fertilizer. Group 3 is the control group. Water group 3 plants using the recommended amount of fertilizer. Water the 3 plants in group 4 using 130% of the recommended amount of fertilizer. Water the 3 plants in group 5 using 160% of the recommended amount of fertilizer.