How to plant arrowhead? Master the arrowhead planting method in 5 steps

To plant arrowhead, you first need to select seed corms that are medium in size, healthy and fully mature, and soak them in clean water for two days before sowing. The sowing time for arrowhead is from late April to early May. Because arrowhead has extremely high water requirements, the water level needs to be adjusted reasonably at different growth stages. Later, reasonable fertilization and effective pest and disease control can improve the yield and quality of arrowhead. Fertilization should be based mainly on decomposed farmyard manure, combined with nitrogen fertilizer, phosphorus fertilizer and potassium fertilizer.

1. Select seed corms

The treatment and selection of arrowhead seed corms are very important, because arrowhead mainly reproduces and grows from seed corms. Generally, we choose healthy, medium-sized, fully mature seed corms, then cut off part of the corm, soak them in carbendazim for about 20 minutes, then dry them and store them over winter. Before sowing, put them in clean water and soak them for about two days before sowing.

2. Water level management

Although arrowhead is an aquatic plant, its water requirements are very strict, and water level management in arrowhead cultivation is quite important. When sowing, the water level in the paddy field is generally controlled at about 3 cm. After about ten days, continue to add water to the field, still keeping the water level at about 3 cm. During the growth period, the water level should be maintained at about 4 cm. If the temperature is above 25°, we need to reasonably raise the water level, controlling it at about 6 to 10 cm. Note that after the seedlings are planted, the soil must always be kept moist.

3. Sowing time

Arrowhead has strict requirements for sowing time. Generally, the sowing time for arrowhead is from late April to early May each year, and the temperature needs to reach above 16 degrees, so that the seedling emergence rate after sowing is higher. The sowing time should not be too early or too late, and the earliest sowing time cannot be earlier than mid-April.

4. Reasonable fertilization

Reasonably fertilizing arrowhead can improve its quality and yield. About one week after planting, fertilization is needed, mainly with decomposed farmyard manure. In order to achieve the best nutrient utilization effect, during its growth process we need to follow the principle of promote, control, promote when fertilizing. During fertilization, we should mainly use decomposed farmyard manure, combined with nitrogen fertilizer, phosphorus fertilizer and potassium fertilizer.

5. Pest and disease control

Timely control of pests and diseases during cultivation helps improve quality and yield. The most common pests include stem borers, armyworms, aphids and so on, which can be sprayed and killed with dimethoate, beta-cypermethrin and aphid-killing pesticide respectively. The main diseases are leaf spot disease, brown spot disease and so on, which can be treated with thiophanate combined with chlorothalonil.