Planting Tips

Chapter 22 How to Determine the Planting Time of Flowers
The sowing time of different flowers is mainly determined by cold tolerance and overwintering temperature.

There are large differences in climate between the north and the south of my country, and the length of the cold winter season varies, so the suitable period for open field sowing depends on the climate of each place.Annual flowers are weak in cold resistance and will die in case of frost, so they are usually sown after the late frost in spring.From late February to early March in the south; from late March to early April in the central region; from late April to early May in the northern region.In order to promote early flowering or more seeds, seedlings are often sown early in greenhouses, hotbeds or cold beds (yang furrows).Biennial flowers in the open field are mostly cold-resistant flowers, and the seeds should germinate at lower temperatures. If the temperature is too high, it is not easy to germinate.East China can survive the winter in the open field without cold protection; in the north, the climate is cold in winter, and most species can only survive the winter in cold beds.

The suitable period for autumn sowing of biennial flowers also varies according to the different regions in the north and the south. In the south, it is about late September to early October, and in the north, it is about late August to early September.The sowing period of perennial flowers varies according to the strength of cold tolerance.It can be sown in spring, summer or autumn with strong cold resistance, especially when the seeds are mature.Some seeds that require low temperature and humidity and complete dormancy, such as peony, delphinium, iris, etc., must be sown in autumn.Evergreen perennial flowers that are not hardy should be sown in spring, or immediately after the seeds mature.Greenhouse flower sowing is usually carried out in a greenhouse. In this way, it is less affected by seasonal climate conditions, so the sowing period does not have strict seasonal restrictions, and often depends on the required flowering period.Most species are sown in spring, that is, from January to April; a few species such as cineraria, cattail flower, cyclamen, primrose, etc. are usually sown between July and September.

(End of this chapter)