For example, seeds that have clumped together should be scattered before sowing. The thorns on the seeds are removed, and then they are soaked to promote germination, resulting in more uniform and faster sprouting. Seeds that have been pre-soaked typically emerge 3 to 5 days earlier than dry seeds.
During summer or early autumn sowing, soak the seeds in cool water for 12 hours, then place them in a cold storage at 4°C or in a refrigerator freezer for 24 hours. Afterward, germinate them at a temperature of 20 to 25°C. Alternatively, the soaking process can be done by suspending the seeds in the water of a well to encourage germination. Sprouts usually appear within 3 to 5 days.
Soaking spinach seeds in hydrogen peroxide is an effective method to remove the glial layer, which improves the germination rate and results in quicker and more uniform seedling emergence.
The procedure involves mixing hydrogen peroxide with water in a 1:4 ratio, ensuring the solution is thoroughly stirred. Once prepared, the solution is placed in a container, and the seeds are added while stirring. Soaking time varies depending on the temperature: if the temperature is below 20°C, soak for 100 to 120 minutes; between 20°C and 30°C, soak for 60 to 90 minutes; and above 30°C, soak for 30 to 50 minutes. After soaking, the seeds are rinsed 3 to 4 times with clean water. Then, they are placed in a container covered with a damp cloth to continue germinating.
If the seeds are mature and of good quality, over 85% will germinate within 5 to 6 days. Seedlings can be transplanted 2 to 3 days after sowing, which is about 6 to 8 days earlier than traditional methods. After soaking and germination, the seeds should be treated with a chlorothalonil solution before planting. The soil in the garden should be kept moist. After sowing, cover the seeds with 1 to 1.5 cm of soil and press it down gently. Cover the area with straw mats. When 10% to 15% of the seedlings emerge, the cover should be removed.
Before soaking in the hydrogen peroxide solution, spinach seeds should be sun-dried for 4 to 6 hours on a sunny day, and any impurities or underdeveloped seeds should be removed to ensure better germination success.
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