Pink Polka-Dot Plant (Hypoestes phyllostachya) Response to Growth Retardants

Abstract Pink polka-dot plant, Hypoestes phyllostachya Bak., was treated with one or two foliar spray applications of Bonzi (paclobutrazol) (25, 50, or 100 ppm), Cycocel (chlormequat chloride) (3500 ppm) or B-Nine (daminozide) (3500 ppm) to suppress shoot elongation. One or two applications of 3500 ppm Cycocel (chlormequat chloride) retarded shoot elongation, resulting in consistently mounded plants. Bonzi (paclobutrazol) and B-Nine (daminozide) also suppressed shoot elongation but to a lesser degree, and plants were not uniform.