Some chrysanthemum"s cultivars, as the 'Gompier Chá', have problems of small growth during winter crop. The spraying whit gibberellic acid (GA3) and the control photoperiod with interrupted short day can be options for to stimulate growth. Thus, an experiment was carried out with the objective of evaluating the stems quality of cut chrysanthemum 'Gompier Chá' response of GA3 and short day (DC) interrupted by long day (DL), during winter time in Rio Grande do Sul. The experiment was conducted at the Universidade Federal de Santa Maria, in 2001, from May to August. The treatments consisted of different gibberellic acid concentration (50, 100, 200, 300, 500 e 500mg L-1) sprayed six, three, two, two and one times, respectively, and short day interrupted (32DL+9DC+12DL+DC until the harvest). The best stem quality was obtained whit GA3 dosages: 100mg L-1 sprayed three times and 200mg L-1 sprayed two times. The short day interrupted used was inefficient to the 'Gompier Chá' quality, while the spraying with gibberellic acid improved the length of floral stalks and the plant height during winter time in Rio Grande do Sul.
floriculture; flowers number; stem diameter
