How to grow dahlias

1. Breeding environment

1. Soil: Choose soil with good drainage and looseness. If the drainage is poor, it is easy to cause root rot due to excessive water accumulation.

2. Watering: The soil should not be too dry or too wet. Just keep the soil slightly moist. Generally, watering is required every day when the weather is sunny. A large amount of water is needed during the growing period and when the temperature is high, so the amount of watering should be increased appropriately. However, if you water too much, water will accumulate and cause root rot, so you must be careful.

3. Light: Dahlias need plenty of sunlight. It is best to receive more than 6 hours of sunlight a day. Only with sufficient sunlight can they grow better. If you place it in a dark or dark place for a long time, it will not grow well.

4. Temperature: Generally, it can grow normally between 5-35℃. If you want it to bloom and grow better, it is best to control the temperature between 10-25℃. This is the most suitable temperature for dahlia growth. Too high or too low is not conducive to its growth.

2. Breeding Methods

Propagation by cuttings: Keep one of the young shoots that grow from the divided roots, and use cuttings on the others when they grow to 3 cm; when the unearthed seedlings grow to 5 cm, choose a healthier one and let it grow, and use cuttings on the others. The temperature should be controlled at 20℃ and the humidity should be maintained at a certain level. It will take about half a month for the seeds to take root.

3. Common pests and diseases

1. Gray mold: It usually occurs during the rainy season. After getting this disease, its leaves and tender shoots will rot and mold will grow. After discovery, the affected parts should be cut off in time and sprayed with 800-1000 times diluted 50% Zineb.

2. Dahlia borer: The larvae generally harm the leaves, flower centers and stems. In severe cases, they can cause death. They can be caught manually or sprayed with 100 times diluted 50% carbofuran.