When is the sowing date of flower seeds?

Different kinds of sowing time is different. The best sowing date of annual flowers is April to May, and the optimum temperature for germination is 27 ~ 32 degrees Celsius.

The optimum sowing date of biennial flowers is 8 ~ 165438+ 10 month, and the optimum germination temperature is 2 1 ~ 27℃. Perennial flowers have a low temperature stage in the growth process, and it is best to finish sowing at low temperature.

First, seed treatment before sowing

1. Seeds that are generally easy to germinate can be soaked in cold water or warm water before sowing, and the water temperature should be controlled below 40 degrees to soften the seed coat or swell the seeds, and then sown, such as morning glory and trollius chinensis. Small seeds do not need to be soaked.

2. For seeds with hard seed coat, because the seed coat is hard, airtight and impermeable, methods such as cutting the seed coat and chemical treatment can be adopted. Seeds such as canna can be scraped with a file or a knife to let the water directly contact the cotyledons. Because cotyledons absorb water and swell, the hard exocarp can naturally rupture and germinate quickly.

3. Ultra-low temperature preservation and low temperature stratification (i.e. sand storage) are often used to treat seeds that need to be dormant under low temperature and humidity.

Second, the sowing date

Indoor potted flowers are usually planted when the weather gets warmer in spring. However, there are many kinds of indoor flowers. Some varieties that bloom in winter and spring are often sown in late summer and early autumn, and those with short growth period can also be sown in late autumn and early winter.

Third, sow.

Indoor flowers are generally planted with 3 parts of peat soil and Gaza 1 part; Rotten soil or fine sandy soil can also be used as sowing soil; Now you can also sow directly with the bought culture soil. Fill the basin with 8 cents of soil, scrape it flat and soak it in water to soak the basin soil for later use. Small seeds, such as Petunia, Tripterygium wilfordii (hexaploid) and Campanula, should be carefully and evenly scattered on the surface of the soaked basin soil.