Center for Landscape & Urban Horticulture
University of California
Center for Landscape & Urban Horticulture


Click the Launch Calculators button to access a set of easy to use calculators that provide reliable estimates of the amount of water lawns and landscape plants require in order to provide acceptable landscape performance and conserve water.  They are not appropriate for estimating water requirements of sports fields, golf courses, plant nurseries, sod farms, or other plant production operations.

These calculators follow the ANSI/ASABE S623 Standard, Determining Landscape Plant Water Demands, the national method for determining water demands of established landscape plants that applies the research-based principles of SLIDE (Simplified Landscape Irrigation Demand Estimation). 






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