Five factors affecting flower seed growth

There are quality problems in seeds.

When buying flower seeds, pay attention to the production date and shelf life marked on the package. In addition, when buying seeds, you should have a basic understanding of them. Generally speaking, seeds sown in spring generally bloom in summer and autumn; seeds sown in autumn generally blossom in spring and summer, with the exception of woody flowers. If the sowing date is reversed and there are no certain out-of-season cultivation conditions, it will be difficult to achieve the expected flowering.

Seed treatment is not in place.

Seeds that are easy to germinate can be soaked, such as a string of red seeds soaked in warm water at room temperature of 40 ℃ for one day and night, rinsed and then sown. Hard seeds, such as asparagus, peony, Jiulixiang, Bairihong, Daphne, etc., should be soaked in 40 ℃ of hot water for about 48 hours before sowing in the basin soil, and can sprout and grow after 20-30 days. For Pearl Plum and Bauhinia which have a short dormant period and are easy to germinate, the seeds can be sowed directly in 40 ℃-60 ℃ warm water for 24-48 hours. Some flower seeds need to be treated at low temperature for a certain period of time in order to promote post-ripening and break the dormancy of seed embryos to germinate, such as cloves, wax plums and some herbaceous flowers sown in autumn. Some flowers have the characteristics of double dormancy of radicle and Hypocotyl, that is, their radicles need to go through a high temperature stage of 25 ℃-32 ℃ for 1 to 2 months or more, in order to break dormancy, such as tassel, pod fan, peony seeds.

The sowing time is unreasonable

Seeds with large grains, solid skins or oily seeds, such as rose, rose, pomegranate, kumquat, magnolia and other flowers, are suitable for sowing in autumn. Seeds with small grains and thin skin, such as chrysanthemum, asparagus, impatiens, hundred-day red, Lingxiao and other flowers, are suitable for sowing in late spring. Seeds that need high temperature to germinate should be sown in time after maturity, such as cyclamen, chrysanthemum, Zhu Dinghong and other flowers should be sown in early summer.

There is a problem with the sowing quality.

There are two forms of flower sowing: open field sowing and pot sowing, both of which require loose and ventilated soil, fine particles and good drainage, and it is better to use fertile soil rich in humus nutrients and moderate acid and alkali, which is beneficial to seed emergence. The specific sowing methods include sowing, strip sowing and hole sowing. Sufficient water should be watered before sowing and covered with plastic film after sowing to prevent the dry soil from affecting seed germination and emergence. The sowing depth is generally 2.5 times of the grain diameter of flowers.

Ignore the influence of light

After flower seeds are sown, proper light can increase soil temperature and induce seed germination, especially for seeds to break through the seed coat, root and bud, which not only affects the emergence rate of seeds, but also directly related to the growth of good seedlings and strong seedlings. Therefore, from sowing to transplanting stage, we should try our best to meet the needs of light for flower growth, and the light intensity is a gradual transition from dark to weak light and then to natural light.