Mistakes that bundled landscapers make

 Setting equal runtimes for all irrigation zones regardless of exposure, plant type, and soil conditions is one of the most common and costly mistakes. Some zones may need 3-4x more water than others, while some may need none. 

 Most HOAs adjust irrigation schedules only 2-3 times per year, when monthly adjustments can save 15-25% on water costs. Many controllers allow for percentage-based seasonal adjustments that take just minutes to implement. 

 Many systems have mismatched pressure requirements between valves and sprinkler heads, resulting in misting (too high pressure) or poor coverage (too low pressure). Pressure regulation at the zone level rather than the system level can improve efficiency by 10-15%. 

 Heavy foot traffic and maintenance equipment can compact soil, reducing infiltration by up to 90%. Core aeration twice yearly in high-traffic areas can dramatically improve irrigation efficiency without changing equipment or schedules.