03.
     Oxygen: Without adequate oxygen, the physiological metabolic activity inside the seed can not proceed smoothly, which requires that the sowing medium be sufficiently ventilated to provide sufficient oxygen for seed germination.
  04.
     Light: seed according to its germination on the light requirements are divided into non-gleaching seeds, neutral seeds, good light seeds. Most of the flower seeds are not demanding on the light, but the seeds of the request should be considered in the planting of the light of the plant to determine the good or bad to determine the soil or not.
  05.
     Sowing nursery containers: flower nursery as far as possible the use of container nursery, and can control the environment under the conditions of the place. At present, we commonly used nursery containers for the plug plate. The specifications of the plug plate vary depending on the seedling crop type and the purpose of the application. The type, shape and depth of the plug plate all affect the growth and development of the plant. Square hole than the circular hole grid volume, more conducive to the growth of the roots, but in the degree of humidity on the round hole is better. Long hole chess grid suitable for the growth and development of the root crops, growth is often stronger than the short tube-shaped grid plate seedlings strong. For the secondary use of the container must be cleaned, disinfected. Container Seedling With the continuous growth of seedlings by small and large replacement of different specifications of the container, usually when the seedlings of the two seedlings collide with each other should replace the larger size of the container.