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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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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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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

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Songul Sever Mutlu and Ece Agan

, 1980 ; Nau, 1989 ; Vasudevan et al., 2008 ). Effects of pinching in terms of significant reduction in plant height, delayed flowering, and increased number of flowering stems have been reported in many commercial flower crops ( Debra and Lewis, 1986

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Xiaotao Ding, Hongmei Zhang, Lizhong He, Haijun Jin, Qiang Zhou, Juan Yang, Weimin Zhu, Jizhu Yu, and Tingting Qian

on yield, but also concerns quantitative information about major processes involved in plant height and width, and leaf area changes, among others ( Ramnarain et al., 2018 ; Zheng et al., 2018 ). These morphological parameters are important for

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Amir Rezazadeh, Richard L. Harkess, and Guihong Bi

influence of PBZ on increased drought tolerance was due to a reduction in transpiration, shorter plant height, diminished biomass and leaf area, and an increase in stomatal resistance ( Fernández et al., 2006 ). Flurprimidol is a triazole similar to PBZ and