Overwintering spinach cultivation requires careful selection of suitable varieties that can withstand low temperatures and resist early bolting. Common varieties tend to bolt quickly after spring arrives, which reduces both yield and quality. Therefore, it's essential to choose strong, mid-season or late-maturing varieties with high cold tolerance, good winter hardiness, and high productivity. Examples include Round Leaf Spinach, Late Round Leaf Spinach, Hua Bo No. 1, and Liaoning Yuan Ye Spinach.
When selecting a site for overwintering spinach, choose areas that meet the standards for pollution-free vegetable production. The location should be sheltered from wind, receive ample sunlight, and have loose, fertile soil with good drainage. The ideal soil pH is slightly acidic to neutral. After harvesting the previous crop, clear the field promptly and prepare the land by plowing. Apply sufficient organic fertilizer as a base, typically 4,000 to 5,000 kg per 666.7 square meters. Insufficient basal fertilizer can weaken plant growth before winter, making them less likely to survive the cold and more prone to bolting in spring.
Proper sowing time is crucial for successful overwintering. Spinach should be sown in mid to late October or early November when the climate is cool and favorable for germination. In most cases, direct sowing is recommended, and seeds should be soaked before planting. If the soil is dry, water the bed before sowing. If the soil is already moist, no additional watering is needed. After sowing, gently cover the seeds with a thin layer of compost and keep the soil consistently moist until seedlings emerge. If sowing is delayed and temperatures are low, use plastic film or shade net to protect the seedlings. Remove the covering once the plants start to grow. For each 666.7 square meters, use about 4 to 5 kg of seeds, and increase the seeding rate if planting later.
After planting, maintain consistent moisture in the soil. Once the seedlings have 3 to 4 true leaves, moderate watering to encourage root development, which is vital for winter survival. If the seedlings are too dense, thin them out when they have 2 to 3 true leaves, spacing them 3 to 5 cm apart. During this period, apply top-dressing with diluted human manure or compost to support healthy growth. Monitor for pests like locusts and control them promptly. During frost or snow, cover the plants with plastic film or shade nets to protect them. Overwintering spinach should be fertilized mainly with organic matter rather than inorganic fertilizers, as excessive nitrogen can lead to nitrate accumulation during the low-light winter months. When spring returns, apply well-decomposed manure to promote strong growth and prevent premature bolting.
Harvesting should be done in batches based on growth conditions and market demand. It’s important to manage the timing carefully, especially around the Spring Festival, to ensure the spinach remains fresh and marketable. Avoid freezing damage by providing adequate protection during cold periods, as frozen leaves can significantly reduce commercial value and quality. Plan harvest times to meet market needs before and after the holiday season.
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Product specifications
Product name:
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