Changes

In dry or temperate climates, an irrigation system can be crucial for establishing and maintaining green roofs. Extensive green roofs planted with drought tolerant plants do not always need an irrigation system, but intensive green roofs planted with a wider variety of plants would not be able survive without one. Most green roofs will require supplemental water either to enhance or speed up the establishment process or to protect the plantings during times of sustained drought. This can be accomplished by hand watering or installing an automated irrigation system.  

In dry or temperate climates, an irrigation system can be crucial for establishing and maintaining green roofs. Extensive green roofs planted with drought tolerant plants do not always need an irrigation system, but intensive green roofs planted with a wider variety of plants would not be able survive without one. Most green roofs will require supplemental water either to enhance or speed up the establishment process or to protect the plantings during times of sustained drought. This can be accomplished by hand watering or installing an automated irrigation system.  

[[File:Spray-Irrigation.jpg|thumb|400px|Picture of a spray nozzle used in an automatic spray irrigation system on a green roof (Photo Source: Vegetal i.D., n.d.)<ref>Vegetal i.D. n.d. Green Roof Irrigation. Accessed May 10 2022: https://www.vegetalid.us/green-roof-technical-resources/extensive-green-roof-design-guide/270-green-roof-irrigation.html</ref>]]

[[File:Spray-Irrigation.jpg|thumb|400px|Picture of a spray nozzle used in an automatic spray irrigation system on a green roof (Photo Source: Vegetal I.D., n.d.)<ref>Vegetal i.D. n.d. Green Roof Irrigation. Accessed May 10 2022: https://www.vegetalid.us/green-roof-technical-resources/extensive-green-roof-design-guide/270-green-roof-irrigation.html</ref>]]

Irrigation systems vary greatly in level of complexity:

Irrigation systems vary greatly in level of complexity: