How often should I dethatch my lawn to ensure optimal health and vibrancy? Is it sufficient to adhere to a predetermined schedule, or should I take into account several influencing factors that may dictate the frequency of this essential maintenance task? For instance, could the grass type, climate conditions, and the overall vitality of my lawn play a pivotal role in deciding when to dethatch? Moreover, how do I assess the accumulation of thatch and discern whether it has reached a critical level that necessitates immediate action? Should I be concerned about the seasonality of this process, particularly in relation to the grass’s growth cycle? Is it beneficial to observe the lawn’s response to dethatching in previous years to gauge the most effective timing? Lastly, could neglecting timely dethatching lead to adverse effects, such as a decline in turf health or increased susceptibility to pests and diseases? What parameters should guide my decision-making in this regard?