Rosa 'KORfizzlem'

Summary

South Coast Research & Extension Center (South Coast REC/SCREC) is located in Irvine California, this site has a sandy loam soil and plants are irrigated with reclaimed water. 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.

Lemon Fizz is a medium-sized shrub rose in the Kolorscape® series with deep green foliage that contrasts nicely with the vivid lemon-yellow simple blooms. This was the earliest rose to bloom in our field with its biggest flush in April. These blooms hold their color until they shatter and fall cleanly from the plant. Foliage in Davis was mostly clean with little damage from pests or disease. Overall appearance was good on all treatments and unaffected by irrigation treatment. The only disappointment of this shrub rose in Davis was in the meager re-bloom: only a handful of the 21 plants ever achieved significant bloom coverage, and that only in April or May, after which only a few blooms were ever found on a plant at any one time. Although bloom performance might improve with age, we were only able to observe the plant for 2 years. Lemon Fizz did not perform well on the low water treatment in Irvine, and all treatments there had some plants with foliage affected by disease during their coastal “June gloom” weather, particularly powdery mildew and botrytis of the blooms, but plants mostly outgrew this during the hotter, drier months. There were no significant irrigation effects on performance in Davis, therefore we recommend low irrigation in WUCOLS Region 2. In Irvine, both flowering and overall appearance were significantly compromised on low water, hence our irrigation category recommendation in WUCOLS Region 3 is medium.

Growth and Quality Data

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