Successful vernalization can only occur in plants of a certain age.Several reports have demonstrated that the vernalization response in wheat is influenced by the stage of development (e.g., developing embryos, germinating seeds, and growing plants) (Liu et al.,2001) and plant age (Hoogendoom 1984), and these reports concluded that wheat gradually loses its sensitivity to vernalizationas it ages. However, the vernalization response in garlic has not yet been thoroughly researched. In this study, plants at different ages were tested, with the oldest garlic plants (65 days after planting, 6-leaved, with a plant height of 47.8 cm and a pseudostem diameter of 5.50 mm) showing the lowest bolting rate. These plants had a bolting rate of only 2.3% after treatment at higher temperatures (T20–15). However, the youngest plants (25 days after planting,4-leaved, with a plant height of 36.7 cm and a pseudostem diameter of 4.31 mm) exhibited the highest bolting rate, although these plants did not bolt after treatment at higher temperatures (Tck and T20–15). These results indicate that younger garlic plants (4-leaved)are more likely to show a stronger vernalization response. More-over, a previous report also found that the 4-leaf stage was the most suitable age for garlic going into winter (Song et al., 2010).It is generally believed that older plants more easily sense vernalization temperatures, and in our study, only A65 plants responded to the higher vernalization temperatures ( T20–15) and bolted. How-ever, the highest bolting rate was not observed in the oldest plants,and older plants may be injured at lower temperatures.