STEMGomeVa19

I am looking for the soil that best grows it the strongest and the quickest. The four types of soil I chose are all made by Miracle Grow. The first soil is the peat moss soil this soil retains moisture and is full of nutrients it is light and fluffy. The second type of soil is organic potting mix, this soil is heavier, darker, and absorbs water like a sponge to protect the plat from either getting to much water or to little water. The third type of soil is a coarse blend it look like tanbark and it has a very strong smell and it is a fast draining mix. The last soil is my favorite the seed starting potting mix it is especially formulated for fast root development and the soil looks light in weight and looks rich in color. I believe this soil will grow the Marigolds the fastest because it is enriched with plant food. I planted 16 seeds into 4 separate aluminum containers for each type of soil. I will water the each soil sample every night at 8pm with one fourth a cup using tap water. As the plant starts to grow I will measure each stem and document it's progress.
 * Stem Topic **: Which soil works best to grow the flower Marigolds?
 * Hypothesis **: My hypothesis is that the potting mix soil will work the best is going to work the best.