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Helen E. Hammond, Richard K. Schoellhorn, Sandra B. Wilson and Jeffrey G. Norcini

Two different plant growth regulators were applied to ‘Torch Flame’ blanketflower (Gaillardia pulchella) and a native blanketflower ecotype to reduce pedicel elongation and final production size. Uniconazole was applied as a spray at 60, 120, and 180 mg·L−1 or as a drench at 6, 12, and 24 mg·L−1 one and two times per plant. Ethephon was applied as a spray at 500 and 1000 mg·L−1 one and two times per plant. When applied as a spray, uniconazole had no effect on torch blanketflower, but when applied as a drench, growth indices were reduced by 12% to 30% without delayed flowering. When treated with ethephon spray, torch blanketflower was 15% to 25% more compact than untreated controls, but flowering was delayed. The blanketflower ecotype did not respond to uniconazole or Ethephon treatments, regardless of the application rate, number, or method.