Final answer:
Summer is not the peak season for turfgrass root growth; this typically happens in spring and fall due to milder temperatures and better growing conditions.
Step-by-step explanation:
summer is not typically the season of greatest root growth for turfgrasses. Root growth for many turfgrasses is most vigorous during the spring and fall when temperatures are milder. In the summer, the combination of high temperatures and potential drought conditions can actually stress turfgrasses, leading to a reduction in root growth. Additionally, root growth is highly dependent on the availability of nutrients and water, both of which can be limited during the hot summer months. The statement that grass typically flowers earlier every year as it gets older does not directly relate to the question of root growth. Moreover, while warmer temperatures can extend the growing season, they also increase water and nutrient requirements, which if not met, can negatively impact plant health and productivity. Forest fires in grasslands, domestication centers, and biomes with year-round growing seasons provide context to plant growth but are not specifically related to the question of seasonal root growth in turfgrasses.