The method and time of raising seedlings of asparagus should be planted from April to July and from June to August in the north.

The method of raising seedlings: first, choose the soil with sufficient fertility and loose permeability, and the temperature should be between 25-30 ℃, because the germination rate of direct sowing will be slow, so it is necessary to soak and accelerate seed germination before sowing to improve the germination rate, and timely fertilization and watering after sowing can promote the rapid growth of hollow cabbage. Seedling time: asparagus is generally planted in April-July, while in the north, it is generally planted in June-August because of the low temperature.

First, planting time

Asparagus needs to grow in the environment of high temperature, humidity and sufficient light, and the seed germination needs to be more than 15 ℃, which is usually planted from April to July, but the temperature in the north is relatively low and is usually planted from June to August.

II. Planting conditions

Puccinellia oleifera has no high requirement for soil, so it is suitable for loose, permeable and fertile soil. It likes the environment of high temperature and humidity. The best growth temperature is 25-30 ℃, and the high temperature is 35-40 ℃.

Third, sowing method

The seed epidermis of asparagus is hard and thick, and if it is sown directly, the germination speed is very slow, thus affecting the seed cycle. It is easy to cause seeds to rot in long-term rainy weather.

Before sowing, soak the seeds in warm water of about 60 ℃ for about 30 minutes, stir continuously to prevent the seeds from being scalded, then soak them in clean water for a day, and then put them into the greenhouse to accelerate germination. The sowing rate per mu is about 2 kg. After sowing, the soil is covered and watered to ensure the moisture of the soil.

Later stage management

Asparagus has a great demand for nutrients in the process of growth, so we must apply sufficient base fertilizer before planting, and water and fertilize it when it reaches 5 cm, which can promote its rapid growth, water regularly and keep the soil moist. Fertilization should also be carried out during harvest, which is beneficial to its secondary growth, mainly nitrogen fertilizer.

Timely harvest

Timely harvest is a key point for the high yield of asparagus, and it can be picked when it grows to about 35 centimeters. If you pick it in time, it will taste better. It is generally picked from the part of the asparagus above 5cm above the ground.

nutritive value

Asparagus is an alkaline food, often eaten in summer, can cool blood detoxification, prevention and treatment of dysentery and summer fever. It contains chlorine, potassium and other elements that regulate water-liquid balance, which can reduce the acidity of the intestinal tract, prevent the imbalance of intestinal flora and prevent cancer. Which contains vitamin C and nicotinic acid can reduce triglycerides and cholesterol, has a certain role in reducing fat and weight loss. Asparagus also has the effect of healthy skin, tooth cleaning, caries prevention and halitosis.