1. Seeding and seedling raising: The seed skin of Oenanthe javanica is thick and difficult to germinate, so it is usually transplanted. When sowing in spring, do you need low temperature treatment?

Choosing autumn sowing requires low temperature treatment. Generally, before sowing, you need to soak in clear water for one day and one night, then take it out to dry, wrap it in gauze and put it in the refrigerator to promote seedlings, or you can hang it in the well by the most traditional method.

Accelerate germination at a distance of 40 cm from the water surface. When the seeds are 50% white, they can be planted, or they can be soaked with 5 mg/kg gibberellin to promote germination.

2. Prepare seedbed: apply base fertilizer to the bottom of soil. Before sowing, the soil must be leveled and watered. When the water exposes all the soil, sow the seeds, then mix some fine sand and cover it with 3 to 4 mm nutrient soil. The soil should not be too thick. Finally, it is covered with film, which can play the role of heat preservation and waterproof.

3. Transplanting: 6-7 days is the fixed seedling stage. At this time, it needs to be fertilized once a week, and one mu can be 10 to 15 kg of urea or ammonium sulfate.

Before transplanting, you need to water one day in advance to facilitate seedling raising. You can transplant with soil, and the time you choose is probably sunny.

When there is not much sunshine, it is best to pay attention to the distance. For example, it is suitable for transplanting after 4 pm, not too dense and the depth cannot be exposed. Finally, water it.