Field Trials

UC Landscape Plant Irrigation Trials

Irrigation Field Trials Plant RowsUC Davis horticulturists are evaluating landscape plants with the potential to be good performers in low-water use gardens. In the first years of the trials, these plants were from the UC Davis Arboretum All-Stars lists, while today the plants are exciting new cultivars provided by growers and breeders who want to evaluate their new plant varieties for low-water use in hot California gardens.  The results of these trials are providing growers and retailers the information they need to successfully distribute and market these plants to the public.

  • To find out more about the trials and see more pictures, visit the trial's  facebook page!

Irrigation Trials

After being grown for a full year on a regular watering regime to establish deep, healthy roots, plants are irrigated through the second growing season with one of three different irrigation frequencies that correspond to the Water Use Classification of Landscape Species (WUCOLS IV) categories of Low, Moderate, and High.  (These categories are based on percentages of reference evapotranspiration with local weather station data used to estimate these percentages.)

 Height and width are measured monthly to calculate a growth index for each species at each irrigation Researchers logging data for irrigation field study level. Overall appearance, flowering time and duration, and pest or disease problems are rated monthly to provide a comprehensive assessment of performance, allowing us to make irrigation recommendations for these plants. This data allows growers to provide good information in marketing their product to the consumer.




Funding has been provided by our cooperating growers and by:
Similar Projects with Native Plants: