Rosa 'Meibenbino'
Rosa 'Meibenbino' Petite Knock Out® on moderate water in November 2022 at UC Davis. Photo: JA Sisneroz.
Summary
Petite Knock Out is the first miniature rose evaluated in the irrigation trials. A small, compact form was observed at both sites. The fire-engine red flowers on Petite Knock Out are 1.5” wide. Petite Knock Out was self-cleaning, but petals turned a light brown color and sometimes remained on the plant longer than desired before shattering from the plant. The brown calyces remained, and due to the slow-growing nature of the compact plant, it took some time to fully obscure them with new foliage, which periodically detracted from the overall appearance. Petite Knock Out was evaluated at UC Davis and South Coast REC (SCREC) with site specific performance details and recommendations below.
UC Davis Trial – Davis, CA
Flowering started with several plants in May and all plants were blooming at the next data collection in June. All plants had some flowers during the remaining months of the trial. At our site the flowers had a vase-like shape rather than being fully open to reveal the center of the flowers. This meant they were not an attraction for pollinators. For aesthetic purposes some pruning was done in late winter after the establishment year to remove the previous years’ remaining spent flowers, but overall, plants retained their compact, dense round form developed in the first year. Petite Knock Out scored well in plant health and overall appearance and we did not find any significant differences between the treatments. We recommend irrigating this plant on Low in WUCOLS Region 2.
South Coast REC – Irvine, CA
At the start of the trial some aphids and leaf tip burn were observed on Petite Knock Out. As the plant leafed out, some shoots proved to be more rapid growers than others resulting in a slightly non-uniform appearance. The plants reached full bloom in May. The persistence of the spent flowers provided a site for aphids. As the growing season progressed, an increasing amount of tip-burn and defoliation were observed. The presence of spent blooms and foliage issues compromised aesthetic performance. The Open House results bear this out; the mean Overall Appearance ratings for June ranged from 3.6 to 3.8, yet by October this dropped to between 2.3 and 2.5. While the mean overall appearance values averaged above 3 for the season, a noticeable downward shift in performance occurred from June to September. We recommend irrigating Urban Legend on Low water in WUCOLS Region 3.
Basic Info
| Submitted by: | Star Roses and Plants |
| Site(s): | UC Davis & SCREC |
| Trial Exposure: | Sun |
| Year evaluated: | 2022 |
| Height & Width (after 2 years): | 2.4-2.7' x 1.4-1.8' - UC Davis 2.2-2.7’ x 1.7-2.0’ - SCREC |
| Reported Height & Width (at maturity): | 1.5' x 1.5' |
| WUCOLS plant type: | S |
| Water Needs & WUCOLS Region: | Low - Region 2 Low - Region 3 |
Mean Overall Appearance rating: (1-5 Scale, 5 is highest) | 3.7 - UC Davis 3.1 - SCREC |
| Flowering Months: | April-October -UC Davis April-October - SCREC |
Growth and Quality Data
Click Here for Complete Data Set - UC Davis
Click Here for Complete Data Set - SCREC
Rosa 'Meibenbino' Petite Knock Out® on low water in June 2022 at UC Davis. Photo: SK Reid.
Rosa 'Meibenbino' Petite Knock Out® on low water in September 2022 at South Coast REC.
Rosa 'Meibenbino' Petite Knock Out® on low water in April 2022 at South Coast REC.