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Effects of two different concentrations of Miracle-Gro solution on Wisconsin fast plant growth

Wisconsin Fast Plant (Brassica Rapa, Brassicaceae) seeds were planted in three six-celled planting chambers. The chambers were filled with standard potting soil under continuous grow-lux lighting. A week after germination, one planting chamber (E1) was supplied with the recommended Miracle-Gro fertilizer solution. Our second experimental chamber (E2) was supplied with 1.5x the eight was 60.4. Our t-tests showed that the height of the control plants vs. E1 was significant (P=.010563), for control plants vs. E2 it was even more significant (P=.008813). However, for E1 vs. E2, our data was insignificant (P=.318883). Our hypothesis was that supplying the Wisconsin Fast Plants with the recommended amount of Miracle-Gro fertilizer solution would cause the plants to grow higher, but supplying the plants with above the recommended amount of fertilizer solution would hinder plant growth. The hypothesis was not supported because the plants in the control chamber grew significantly higher than any of the plants in the Miracle-Gro solution. We believed this result was attributed to an excess of nutrients in the Miracle-Gro solution that inhibited plant growth.