Autumn bulbous flowers are biennial flowers, most of which are long-term, usually spring flowers.
Bulbous flowers planted in autumn, such as hyacinth, have the characteristics of cold and heat resistance. Generally, they like the growth environment of sunny and windward. When the temperature is above 8 ℃, they can grow normally. They have strong cold resistance. Most of them can bear - 14 ℃ low temperature. Bulbs can even live in the open for winter, but they should not be hot. When the temperature is high in summer, the upper part of the ground will gradually wither and the underground bulbous will enter into dormancy. Autumn planting, the best choice is loose fertile, drainage good micro acid sandy loam. The temperature will stop growing and enter semi - dormancy after the temperature gradually reduces in winter. The temperature will rise gradually in the next year, grow rapidly, and bloom in spring.
