1. After the seeds grow out of the seedlings, appropriate irrigation should be carried out. When the soil fertility is insufficient, fertilizer should be added. Applying nitrogen fertilizer is OK, and one-time fertilization is OK at the seedling stage.
2. In April of the second year of planting, when the seedlings grow up, they can be planted. When planting, sandy soil or humus soil shall be selected, and basic fertilizer shall be added, and planting shall be carried out at a distance of 40 * 30 cm. In the period from planting to flowering, nitrogen fertilizer can be added twice.
3. Pay attention to shade during seedling period, like humid and fertile environment, long-term sunlight will lead to water loss of leaves. Although like wet, but too much water will also lead to plant death.