Greenhouse spinach planting method and time

Spinach has a short growing cycle, usually only a few weeks from sowing to harvesting, making it a quick-maturing vegetable . Spinach is relatively cold-tolerant and can grow in cool climates, making it suitable for planting in early spring and late fall. Let’s learn about the planting methods and time of greenhouse spinach.

1. Variety selection

You should choose varieties that are cold-resistant, fast-growing, high-yield, and disease-resistant. Spinach is divided into thorny and thornless varieties. The thorny variety has smaller and thinner leaves, is more resistant to cold and heat, and is suitable for eating; the thornless variety has larger leaves, is less resistant to heat, and is suitable for overwintering cultivation. Recommended varieties include Boza 58, Boza 18, All-Round, Boza Crown, etc.

2. Sowing time

The suitable sowing time for greenhouse spinach is autumn, generally from late August to early September. In frost-free areas, it can be planted in both autumn and winter; in frost-prone areas, it should be planted in late summer and early autumn to ensure that it matures before frost.

3. Land preparation and fertilization

After harvesting autumn vegetables, do not remove the greenhouse film, but directly apply fertilizer, prepare the land, and make beds. Generally, 3-5 tons of high-quality decomposed farmyard manure, 20-25 kg of diammonium phosphate, 10-15 kg of potassium sulfate or 40-50 kg of 45% ternary compound fertilizer are applied per mu.

4. Germination and sowing

The day before sowing, soak the spinach seeds in cold water for about 12 hours, rub off the mucus, take out and drain, and then sow or germinate them at 15-20℃. After 3-4 days, most of the seeds will turn white and then they can be sown.

5. Field management

From sowing to mid-February of the following year, the main focus is on protecting the seedlings. Water thoroughly before the Minor Snow Festival to conserve moisture and protect the seedlings. In mid-February of the following year, as the outside temperature rises, spinach begins to turn green and grow. At this time, it is necessary to water it once, and apply fertilizer with the water in early March, each time applying 15-20 kg of ammonium sulfate or urea, until harvest.

6. Pest and disease control

Common pests and diseases include aphids, leaf miners, downy mildew, anthracnose, etc. Aphids can be controlled by spraying 1000 times diluted 40% dimethoate or 2000-3000 times diluted 50% cypermethrin; leaf miners can be controlled by spraying 1000 times diluted 50% chlorpyrifos emulsifiable concentrate or 1000 times diluted 80% trichlorfon powder; downy mildew and anthracnose can be controlled by spraying with corresponding fungicides .

7. Harvest in time

Greenhouse spinach is generally harvested in mid-to-late March to avoid affecting the next crop of production. Water 1-2 days before harvest, and harvest in the morning when there is a lot of dew on the leaves.

The above are the key points for growing greenhouse spinach. By following the above steps, you can ensure the high-quality production of greenhouse spinach.