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Mengzi Zhang, Jie Yang, Huitang Pan, and Brian J. Pearson

develop long flower peduncles that can result in lodging and decreased commercial marketability. Therefore, controlling the height of baby primrose in greenhouse environments is critical to its potential commercial success. Plant growth regulators (PGRs

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Christopher J. Currey and Roberto G. Lopez

Poinsettia is an important flowering potted crop in the United States with a wholesale value of over $153 million ( U.S. Department of Agriculture, 2009 ). Poinsettia height can exceed the requirements for commercially acceptable finished plants

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Silvia R. Marino, Jeffrey G. Williamson, James W. Olmstead, and Philip F. Harmon

harvest season (before destructive sampling on June 2011), only removing the old flower spikes while the new vegetative flush was allowed to grow. Vegetative field measurements. In 2010 and 2011, from July to November, average plant height and width in

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Bruce L. Dunn, Carla Goad, and Lynn Brandenberger

Girl’, ‘Big Boy’, and ‘Champion II’ seedlings with application rates of 0, 2.5, 5 or 10 mg⋅L –1 uniconazole at 14, 21, and 28 d after sowing responded similarly in height reduction compared with the control plants for most cultivars and produced plants

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Brian A. Krug, Brian E. Whipker, and Ingram McCall

Caladiums can be excessively large relative to the container in which they are grown, and plant growth regulators (PGRs) are required for height control. No industry standard has been set for optimal height of caladiums, but plants 25 to 28 cm tall

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Sonali R. Padhye and Judith K. Groninger

during greenhouse or nursery production, hence suppressing plant height is necessary. Controlling the height of ornamental grasses has multiple benefits, including avoiding container lodging, maintaining height proportional to the container to improve

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Josh B. Henry, Ingram McCall, and Brian E. Whipker

limit plant height and promote overall compactness. Growers typically manage excessive stem elongation with chemical growth regulators such as PGRs ( Whipker, 2017 ). A concern associated with PGRs is that they are not labeled for all crops. PGRs also

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Phoebe Austerman, Bruce L. Dunn, Harpreet Singh, Charles Fontanier, and Stephen Stanphill

–12.5K water-soluble fertilizer (Jack’s; JR Peter, Inc., Allentown, PA, USA) at a rate of 200 mg·L −1 was applied with each watering with 20% leaching fraction. Data collection Data were collected 6 weeks after transplanting for plant height

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Janni Bjerregaard Lund, Theo J. Blom, and Jesper Mazanti Aaslyng

One of the environmental concerns in the production of potted plants is the use of plant growth retardants (PGRs) for the control of plant height. In the search for alternatives to PGRs, changes in light quality [e.g., increased red to far

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Inmaculada Moreno-Alías, Hava F. Rapoport, Rafael López, Lorenzo León, and Raúl de la Rosa

et al., 1976 ; Zimmerman, 1977 ) and, more recently, olive ( De la Rosa et al., 2006 ; Pritsa et al., 2003 ; Rallo et al., 2008 ). In this latter species, early elimination of plants with a long juvenile period is based on plant height measured