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This study was conducted to investigate the effects of sucrose contents in pulsing solution and pulsing period according to flower bud maturities on the flower qualities and optimum harvesting stage of single flowering type Paeonia lactiflora ´Euisung-Jaerae´. Maturity I was the stage that only the margin of calyx turned to red, and maturity II was the stage that calyx started to open and petals could be seen, and maturity III was the pulsing stage that petals were puffed. Sucrose concentrations in pulsing solution were 0, 5, 20, and 35%, and the periods were 12 and 24 hours. At maturity I, control flowers could bloom, but flower qualities were poor in early harvested flowers. Flower bud development was accelerated by pulsing with sucrose solution, and solution uptake and fresh weight increased with increasing pulsing period and sucrose concentration. But the optimum pulsing solution and period might be 20% and 24 hours because, at 35% and 24 hours pulsing, solution uptake decreased and flowers were wilted. Harvesting time could be advanced to maturity II because there ware no differences between maturity II and III in flower qualities.
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