[Objective] The purpose was to seek the best transplanting period for flue-cured tobacco,which was suitable to different ecological regions in Tianzhu County,and provide the basis for development of Tianzhu characteristic tobacco.[Method] The plot contrast test was carried out in different ecological regions of Tianzhu,4 transplanting periods were set up: April 15,22 and 29 and May 6,the effect of different transplanting periods on agronomic characters of tobacco plant,tobacco yield and production value was...