The growth cycle of spinach is around one hundred and twenty days, fall spinach is around thirty-five days, and those sown in the winter or spring need around forty-five days. Depending on the temperature, it can be planted all year round, with summer being more difficult and the growing time is around forty days.
Spinach growth process
1, nutritive growth period
Spinach growth process is divided into reproductive, nutritive two growth period. From spinach seeding, seedling, to have been differentiated leaves and inflorescences all grown, this stage is the nutritional growth period.
Spinach cotyledons begin to unfold to grow two true leaves of time is relatively slow, inflorescence differentiation of the number of leaves depending on the variety, sowing period, climatic conditions vary, five to twenty pieces.
2, reproductive growth period
From bud differentiation to spiking, buds, flowering, seed setting, seed maturity period is the reproductive growth period. Flower bud differentiation is the turning point from nutrient growth to reproductive growth, the number of leaves no longer increases, but leaf area and leaf weight will continue to grow.
Spinach planting
1, sowing time
The ability of seedlings to overwinter, harvest time and yield is closely related to the early and late sowing. Spinach should be 40 to 60 days long before overwintering, growing 4 to 6 true leaves, cold resistance. Northern spinach is generally appropriate to sow in late August to early-mid September.
2, variety selection
Wintering spinach should choose the cold hardiness, good quality, yield potential of pointed leaf varieties. Such as Zhucheng pointed leaf spinach, Shuangcheng pointed leaf spinach and so on.
3, make the bed
Select the wind to the sun, the soil is loose and fertile, good drainage conditions, neutral or slightly acidic soil. After cleaning the garden per acre of high-quality rotting organic fertilizer 5000 kg, 25 kg of compound fertilizer, deep plowing more than 25 cm, and then made into 1.2 ~ 1.5 m wide flat bed.
4, sowing
Spinach seed germination is slow, in order to shorten the seedling period, the day before sowing with 20 ℃ warm water soak the seed for 12 hours, and then the seed will be fished out a little bit drying after sowing.
There are two methods of sowing: dry sowing and wet sowing, and wet sowing can be used when soil moisture is not good. There are two kinds of sowing methods: sowing and strip sowing.
Spreading is the seed evenly spread on the bed, mulching thickness of 3 cm, strip sowing is in the bed according to the row spacing of 10 to 15 cm furrow sowing, mulching 3 cm, sowing compaction. The amount of seed per 667 square meters is 4 to 6 kg, and the amount of seed sown can be increased appropriately in cold areas.