Xeriscaping is the process of landscaping, or gardening, that reduces or eliminates the need for irrigation. It is promoted in regions that do not have accessible, plentiful, or reliable supplies of fresh water and has gained acceptance in other regions as access to irrigation water has become limited, though it is not limited to such climates. Xeriscaping may be an alternative to various types of traditional gardening.
In some areas, terms such as water-conserving landscaping, drought-tolerant landscaping, and smart scaping are used instead. The use of plants whose natural requirements are appropriate to the local climate is emphasized, and care is taken to avoid losing water to evaporation and runoff. However, the specific plants used in xeriscaping vary based on climate as this strategy can be used in xeric, mesic, and hydric environments. Xeriscaping is different from natural landscaping, because the emphasis in xeriscaping is on selection of plants for water conservation, not necessarily selecting native plants.
Xeriscaping produces greenspaces that require low amounts of maintenance and irrigation, and promote biodiversity; however, due to societal norms and lack of landscape understanding, public perception of xeriscaping has frequently been negative, as some assume that these types of landscapes are ugly expanses of just cactus and gravel. However, studies have shown that education in water conservation practices and xeriscaping's benefits can greatly improve the public's perception of xeriscaping.
Etymology and similar terms
Denver Water coined the term xeriscape in 1981 by combining landscape with the Greek prefix xero-, from (), meaning 'dry'. The term zero-scaping (or zeroscaping) is sometimes substituted for xeriscaping due to phonetic similarity. When used seriously, zero-scaping usually refers to a different type of low-water landscaping that uses very few plants or none at all. Because o is the most common connecting vowel in Greco-Roman vocabulary, xeriscaping is sometimes misspelled as xeroscaping. Similar terms and phrases include water-conserving landscaping, drought-tolerant landscaping, and smart scaping.
Advantages
Xeriscaping has the potential to reduce water usage and maintenance, improve biodiversity, lower pollution, as well as mitigate heat within urban areas; however, the effectiveness of this sustainable process has not been evaluated on a long-term large-scale basis. It was found that in arid US states, like Arizona and Nevada, that 75% of households' potable water was used to water residential and urban lawns. Xeriscaping aims to help preserve water for people and animals amidst an increase in droughts brought about by climate change.
Water conservation and lower maintenance
Xeriscapes can reduce water consumption by 60% or more compared to regular lawn landscapes. In Turkey, one of the first large scale xeriscaping evaluations was conducted. It was found that switching an average city park to more native vegetation in the region can lower irrigation usage by 30–50%. Assuming a water usage reduction of 30% it was found that a city can save roughly $2 million annually (however, this exact value is dependent on location). The use of native plants lowers the necessity of watering as the vegetation has already adapted to thrive in the climate and does not require assistance with irrigation or fertilization.
The Leadership in Energy and Environmental Design program has recognized xeriscaping as an effective water reduction process and has started to incorporate credits in the certification process across all their programs for facilities that reduce their outside water use and irrigation. This credit can be met by using xeriscape strategies and efficient irrigation systems. This further validates the beneficial claims behind xeriscaping, and it is anticipated that more energy and environmental credit systems as well state ran programs will encourage and incentivize xeriscaping for greenspace development.