What is a problem that can result from overfertilization?

Overfertilization can lead to excess growth of succulent foliage, which is the correct answer. When plants receive too much fertilizer, particularly nitrogen, they can become overly vigorous in their growth. This often results in lush, green leaves and stems at the expense of root development and overall plant health. Such excessive foliage can make plants more susceptible to diseases and pests because they may have weaker structures and less robust root systems. Additionally, an overabundance of growth can lead to crowding, limiting air circulation and increasing humidity around the plants, further promoting disease.

In contrast, decreased soil fertility is not typically a direct result of overfertilization; rather, it might occur due to nutrient leaching or incorrect balancing over time. Reduced pest populations are also unlikely to be a consequence of overfertilization; in fact, an environment with lush growth can attract more pests. Lastly, lower irrigation needs do not correlate with overfertilization; in fact, plants with excess foliage might require more water due to increased transpiration rates.