Plant Growth Experiment

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by ghadley
Last updated 4 years ago

Life Science

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Plant Growth Experiment

Plant Growth Experiment

My Question



My Equipment


My Hypothesis

If I put sand in half of all the pots then all the plant pots would drains water faster and then maybe not grow because sand drains the water out of the pot.

What is the better plant soil using different types/brands of soil?


All of the pots of soil were made with 50% sand as a constant. This is most likely the reason for only one of my plants growing. Before the research process, I came across the idea that too much sand drains water too fast and the plant doesn't get enough water. Every day I noticed that after around 5 minutes all of the plants water dried up except the Lobster Compost. It was the fluffiest of them all and seemed like it could hold the water the best. At day 7 of checking the plants or May 8, was the tallest the plant had gotten. The two days after it tallest point, the plant began to wilt and slowly die. The two ideas that I came up with that was the cause of the wilting was that Andy’s plant was hovering over mine and maybe blocked out some of the sunlight the plant needed to grow. the other reason was that some how I stopped giving the plant enough water that it all drained through it or I gave it too much water that it became waterlogged. I think the reason that my other plants didn’t grow because I maybe didn’t mix around the soil and the sand. I put the sand in first and the soil on top. I did mix them all but maybe not enough. the roots may have not been able to grow and absorb water in the sandy soil.

1: Collect four different types of soil2: Place the four different types of soil in four pots or vases3: Place two of same type of plant seeds in each of the pots or vases4: Place plants in same room in the same amount of sunlight5: Water each plant every other day at the same time for each pot6: Collect data (measuring plant) every non watering plant days7: Create charts at the end of the collection of data8: Conclude my findings

Data Analysis

Soil 2: Lobster

Soil 3: Cow Manure

Soil 1: Blueberry, Mussels, and Salmon

Soil 5: Organic

Soil 4: Fertilizer



Too much sand can drain the water from the pot that the plant needs to grow. Some sand can help drain some if it rains too much and can help prevent the plant to become waterlogged. Also if you were to water plants, make sure to water them consistently. Too much one day and too little the next can cause the plant to not grow its natural height. If there is shade blocking the plant try to move the plant to an as sunning place where it can get the most sun. If not, the plant could die from not getting enough sunlight. When planting the soil, mix the soil around so that it is even on the top of the soil as it is at the bottom of the soil.

For soil to be defined as the word soil, the following components must be included. Soil includes water available, mineral or weathered fragments, organic fragments such as the remains of plants or animals, nutrients in the ground, air spaces in the ground, and living organisms other than plants. The growth rate of plants in different all depends on the texture, particle size, and water. The texture is determined by three things: sand, silt, and clay. Sandy soil would feel gritty, while clay soil would feel sticky, and silt soil would feel powdery. The particle size affects the movement of air and water in the soil. The largest particle is sand which is 0.05mm - 2.00mm. Silt is the next largest at 0.002mm - 0.05mm in size. Lastly, clay is the smallest particle with a size less than 0.002mm. Any other basic particle includes organic material that was once living there. Water is an essential component to plants. Light soil and heavy soil are different when it comes to holding water. Light soil is soil with a higher sand content than other soil and is very bad at holding water which allows water to drain. The plant could since it is receiving less water than it should. Heavy soil, which has higher content of clay, can hold water very well to the point of too well. The roots are then waterlogged and cannot get enough oxygen. Loam is the ideal soil. Loam includes rich organic materials and a balance of sand, silt, and clay. Plants can grow the best in loam.

1. 3 or 4 different types of soil2. 3 or 4 of the same pots3. 10 - 20 seeds of the same type4. A cup of some sort5. Heat source6. Water7. Ruler


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