Which of the following is NOT a factor that influences outside water use?

• A. Weather
• B. Exterior Wall Color
• C. Soil Type
• D. Water Rates

Answer: (B)

Outside water use is driven by climate and plant–soil needs. Weather determines how fast water evaporates and how much plants transpire, so irrigation must adapt to temperature, wind, and sun exposure. Soil type affects water holding capacity and drainage, which changes irrigation frequency and amount. Water rates influence how much people choose to water and the efficiency measures they adopt. Exterior wall color doesn’t affect plant water requirements or how water behaves in the landscape, so it isn’t a factor in outdoor water use.