Cultivation methods and precautions of Rehmannia glutinosa

1. Maintenance methods

1. Soil: Rehmannia likes fertile soil. It is not suitable for sticky red soil and yellow soil. Generally, sandy soil is the most suitable for planting.

2. Water: Rehmannia has poor water absorption and a small root system. Too much water will cause its rhizomes to rot. Just keep the soil moist and water less frequently. There should be no accumulation of water. When it rains, drainage should be carried out in time to prevent flooding.

3. Nutrients: After planting, Rehmannia needs to be fertilized once. Generally, chicken, duck, pig manure and human manure can be used. For the rest of the time, you only need to apply fertilizer once every half a month, which is more conducive to the growth of Rehmannia.

4. Sunlight: Rehmannia is a plant that likes light and needs a good sunshine environment during its growing period. When choosing land for planting, do not choose a place close to tall crops, as they will block the sunlight of the place. But it is also not resistant to strong light, which is something you need to pay attention to.

2. Breeding techniques

1. Weeding and pruning: As the Rehmannia grows, some weeds will grow in the soil. At this time, the weeds need to be dealt with in time, otherwise the weeds will absorb the nutrients in the soil. If the nutrients absorbed by the Rehmannia are insufficient, its growth rate will be affected. It is also necessary to trim off the dead branches and rotten leaves of Rehmannia in time to reduce nutrient loss.

2. Reproduction: Rehmannia is generally propagated by rhizomes. Choose strong rhizomes, dig them up and break them into short sections of 4 to 5 cm. After drying slightly, transplant it to soil with sufficient nutrients. Pay attention to drainage when it rains and wait until spring to transplant it.

3. Problem diagnosis and treatment

1. Leaf spot disease: Leaf spot disease and wilt disease are common diseases after planting Rehmannia. At this time, you only need to use a double-volume Bordeaux liquid spray and pay attention to ventilation.

2. Pests: Cotton red spiders and butterflies are common after planting. At this time, you need to spray with carbofuran and dichlorodiphenyltrichloroethane.

IV. Other issues

1. How to survive the winter: In winter, if it is a potted plant, it needs to be moved indoors, and the temperature must be controlled to prevent frostbite.

2. Can it be placed indoors: It can be grown indoors, but considering the number of flowers blooming, we need to increase the sunlight appropriately, so that its flowers can bloom more brightly.