Landscape Watering Guidelines

  • Landscape Watering Guidelines

    • Effective irrigation system design, installation and maintenance are important.
    • Sprinklers should serve only the required turf areas and not spray on buildings, fences, or non-landscaped areas.
    • Watering should be done before sunrise to reduce evaporation losses.
    • Turf areas, planters, trees, and shrubs should be watered separately to meet varying water needs.
    • Always irrigate the entire depth and width of the root zone regardless of the time of year.
    • Once or twice a year, water twice as long to leach out salts that build up in our soils. 
    • See the Landscape Watering Guidelines Flyer 
    Landscape Watering Guidelines
    for Established & New Plants
     
    How Much &
    How Often
    Seasonal Frequency
    Days Between Waterings
    Water This Deeply
    Spring
    Mar-May
    Summer
    May - Oct
    Fall
    Oct - Dec
    Winter
    Dec - Mar
    Trees Desert Adapted 14 - 30 days 7 - 21 days 14 - 30 days 30 - 60 days 24 - 36 inches
    High Water Use 7 - 12 days 7 - 10 days 7 - 12 days 14 - 30 days 24 - 36 inches
    Shrubs Desert Adapted 14 - 30 days 7 - 21 days 14 - 30 days 30 - 45 days 18 - 24 inches
    High Water Use 7 - 10 days 5 - 7
    days
    7 - 10 days 10 - 14 days 18 - 24 inches
    Ground-covers
    and Vines
    Desert Adapted 14 - 30 days 7 - 21 days 14 - 30 days 21 - 45 days 8 - 12 inches
    High Water Use 7 - 10 days 2 - 5
    days
    7 - 10 days 10 - 14 days 8 - 12 inches
    Cacti & Succulents 21 - 45 days 14 - 30 days 21 - 45 days If needed 8 - 12 inches
    Annuals 3 - 7 days 2 - 5
    days
    3 - 7 days 5 - 10 days 8 - 12 inches
    Warm Season Grass 4 - 14 days 3 - 6
    days
    6 - 21 days 15 - 30 days 6 - 10 inches
    Cool Season Grass 3 - 7 days None 3 - 10 days 7 - 14 days 6 - 10 inches
    These guidelines are for established plants (1 year for shrubs, 3 years for trees). Additional water is needed for new plantings or unusually hot or dry weather. Less water is needed during cool or rainy weather.
    Drip run times are typically 2 hours or more for each watering

    Watering Schedule for Newly Planted
    Desert Adapted Plants
    How Much &
    How Often
    Spring
    Mar - May
    Summer
    May - Oct
    Fall
    Oct - Dec
    Winter
    Dec - Mar
    Weeks 1 & 2 every
    3-4 days
    every
    1-2 days
    every
    3-4 days
    every
    3-4 days
    Weeks 3 & 4 every
    6-7 days
    every
    3-4 days
    every
    6-7 days
    every
    6-7 days
    Weeks 5 & 6 every
    7-10 days
    every
    4-6 days
    every
    7-10 days
    every
    7-10 days
    Weeks 7 & 8 every
    10-14 days
    every
    7 days
    every
    10-14 days
    every
    10-14 days
    After week 8 Gradually extend the time between irrigations until plants are established
    NOTE: After the eighth week, move the drip emitters to the outer edge of the root ball.
      High water use plants may require more frequent irrigations.
      Water deeply to 24-36 inches for Trees, 18-24 inches for Shrubs, 8-12 inches for groundcover, vines, caucus, succulents & annuals, and 6-10 inches for warm and cool season grasses.

     


    Water Resource Management 
    16000 N. Civic Center Plaza
    Surprise, Arizona 85374

    Hours: Monday - Friday 8 a.m. - 5 p.m., closed on City Holidays .

    Phone: 623.222.6000
    Fax: 623.222.7001
    TTY / VP: 623.222.1002
    Email Us
    Report a problem

    The city of Surprise is a proud member of AWPCA, AWWA and WEF