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WUCOLS IV, University of California, 4,103 plants

Every California plant with a water rating, A to Z

This is the full University of California WUCOLS IV plant list, with water use ratings for each California climate zone. It also links to our 1023 written plant watering guides.

Browse by letter

A167B348C478D158E103F185G195H145I68J76K64L166M273N79O72P286Q18R184S505T195U14V61W200X2Y57Z4

Browse by type

Trees811Shrubs1,531Perennials1,254Ground covers278Vines185Succulents199Ornamental grasses143Bulbs126Palms and cycads59Bamboo32California natives834Arboretum All-Stars82

How to read the ratings

  • VLVery low water. WUCOLS plant factor: under 0.10 of reference evapotranspiration.
  • LLow water. WUCOLS plant factor: 0.10 to 0.30 of reference evapotranspiration.
  • MModerate water. WUCOLS plant factor: 0.40 to 0.60 of reference evapotranspiration.
  • HHigh water. WUCOLS plant factor: 0.70 to 0.90 of reference evapotranspiration.
  • DashNot rated. WUCOLS gives no water use rating for this plant in that zone.
  • ×Not suited to this zone. WUCOLS marks this plant as unsuitable for that zone.

The six climate zones

  • Zone 1North-Central Coastal. Reference city: San Francisco.
  • Zone 2Central Valley. Reference city: Sacramento.
  • Zone 3South Coastal. Reference city: Los Angeles.
  • Zone 4South Inland. Reference city: Riverside.
  • Zone 5High and Intermediate Desert. Reference city: Victorville.
  • Zone 6Low Desert. Reference city: Palm Springs.
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Sources