The bar chart illustrates the average height of bean plants after being treated with four different brands of fertilizer, compared against a control group that received no fertilizer. Overall, it is clear that while some brands significantly enhanced plant development, others were detrimental to growth.
Granny's Bloomers proved to be the most effective product, yielding the tallest plants at an average height of 27 cm. K Mark Fertilizer also demonstrated positive results, with plants reaching an average of 22 cm. These two brands were the only ones to outperform the control group, which achieved an average height of 13 cm.
Conversely, the remaining two brands resulted in growth levels below that of the untreated plants. Job's House Plant Spikers produced plants with an average height of 15 cm, which is slightly higher than the control, yet notably lower than the top performers. Most strikingly, Miracle Gro had a negative impact on growth, with plants reaching a mere 6 cm on average. This represents less than half the height of the plants that received no fertilizer, suggesting that this specific brand may hinder rather than assist the development of bean plants.