Reproductive process

Seedling raising

Let's start with seeds. Seeds must be cultivated well in the early stage, otherwise sowing can't go on. Generally, the seeds of Spiraea begin to blossom in 2-3 days. After another four days, they will be able to straighten and bear fruit. It has almost no dormancy. It is generally the characteristic that flowers bloom all the year round. You can soak the seeds in warm water (30 ℃) for one day and one night, then take them out and put them in a Petri dish (General specification is OK) padded with wet filter paper. They will germinate in the room with a temperature of 18-20 ℃ for about 8 to 10 days

Sow

The sowing time is generally in early summer. You can choose to sow in the open field in the courtyard or potted indoors. The autumn sowing in the southern suburbs can germinate quickly and overwinter in the state of seedlings. The suburbs of Beijing can be sown in early April, while the suburbs of Nanjing can be sown in early March

Film covering

After sowing, the soil cover will be about 0.5-1.0 cm, and it should be covered with plastic film. It can be excavated smoothly in 7-10 days, and primary leaves will grow in 7 days. The height of this year can reach thirty or forty centimeters. It will bloom in about three years

Shade

Spiraea can provide shade if it is directly clocked under the tree. In this way, the seeds can grow faster in the germination stage, and the small seedlings can come out more

Warm tips

The above may be complicated. Another simple saying is that the so-called sowing and breeding technology is to sow Spiraea after picking or dry hide until the next spring. Before sowing, the soil should be soaked with water, then sown, and then covered with a layer of soil. It can germinate in about a week.