Rosa 'KORsixkono'

Summary

UC Davis is located in Davis, California, this site has a silty clay loam soil and plants are irrigated with potable water. More information about the field sites is located in the Nuts & Bolts section.

The Kolorscape® collection of roses was bred to be a self-cleaning, disease free landscape rose, and in our trial it proved itself to be just that.  Reaching an average height and width of 39” x 45” (98.5 x 114.5 cm), it bloomed from April through October with rates of flowering on the lowest treatment as high as those on the highest treatment.  Because the flowers open up widely at full bloom, they were frequented by a wide variety of pollinators.  Growth showed no significant differences between treatments.  Thrips feeding was marginally higher on the lowest treatment, but overall appearance was only moderately affected by the end of the summer.  While thrips were found on all treatments, the vigorous dark green foliage did not show the damage except upon close examination. There was some edge burn on a few plants in each treatment beginning in July, which we attribute to boron accumulation, and a couple of plants on the lowest treatment were showing water stress by the end of summer.  However, this was not the case with all plants on that treatment, as can be seen from the comprehensive ratings (Table 11) and the photographs. The slightly lower ratings on the 40% treatment are more reflective of plants that were less vigorous from the start than from irrigation effects.

Growth and Quality Data

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