Aflower bud of a yellow tree peony High Noon began to initiatc in the 丘rst tcn days of Scptember and the gynoecium differentiation occurred in the middle ten days of October , The Japanese tree peony Hanakisoi used as a control cultivar initiated a flower bud in the middle or during the last ten days of June and gynoecium differentiation occurred in the middle ten days ofOctober , t , In the forcing culture of High Noon ,flowerlng percentages of one − year − old plants were undcr 50 % in all

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... atments . Whereas , those oftwo − year − old plants were 100 % . Furthermore , the earlier the planting, the earlier the る り sprouting and flowering. When planted in the last ten days ofOctober , High Noon 且owered in the 皿 iddle ten days of December . l ナ Consequently , as for the December shipping of High Noon , thc method of chillingjust after digging in the first ten days of September and planting in the last ten days of OctQber by using two − or more − year − old plants is recom − mended .