Five points for fertilizing winter spinach

March 12, 2024

Properly control nitrogen fertilizer before wintering. Spinach's fertilizer and water management standard before wintering is to ensure that spinach grows 4 to 5 true leaves before wintering. Because 4 to 5 true leaves of spinach have the strongest cold resistance, too large or too small are susceptible to freezing damage. Therefore, if the sowing date is appropriate and the accumulation of fertilizer is sufficient, the application of nitrogen fertilizer should be properly controlled before wintering to prevent the seedlings from growing too long and the accumulation of dry matter and sugar to be reduced and suffering frost damage. If the sowing is too late or the soil is insufficient, you can consider topdressing nitrogen fertilizer to promote the growth of seedlings to ensure that spinach winters at the appropriate seedling age.
Apply enough base fertilizer. Overwintering spinach has a long growth period. In order to prevent dehydration, the base fertilizer must be fully applied. Generally, organic fertilizer and all phosphorus and potassium fertilizers to be applied as the base fertilizer are applied in the whole layer, and then the ground is prepared for hoeing.
Strengthen the management of fertilizer and water after returning to green. The key to the management of spinach fertilizer and water after wintering is to seize the opportunity of fertilizer application. Spinach topdressing is carried out with irrigation. Premature topdressing after returning to the green will reduce soil temperature, affect slow seedlings and growth, and late topdressing will delay spinach growth. For wintering spinach, it is generally more suitable to apply it twice in mid-March, late-March, and early-April, because the outside temperature and soil temperature are steadily increasing at this time.
After wintering, topdressing must be carried out before spinach is pumped and flowered. Because topdressing at this time can extend the spinach flowering and flowering time, which is conducive to improving the yield and quality of spinach.
Use ammonium nitrogen fertilizer with caution. Spinach is sensitive to ammonium nitrogen fertilizer. The production season of overwintering spinach is at the junction of autumn and winter and winter and spring. At this time, the soil temperature is low and soil digestion is weak. Therefore, it is best to use ammonium nitrogen fertilizer and use nitrate nitrogen fertilizer appropriately.
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