I. Introduction. Dahlias, with their rich colors and unique shapes, have become the star of many gardens. However, with the advent of winter, how to protect the ground to grow dahlias for safe wintering has become the focus of attention of many gardening enthusiasts. This article will give you a detailed introduction to the key steps of dahlia ground planting for winter, to help you protect the bloom and welcome the warm spring sun.
2. Prepare in advance.
Before winter sets in, it's crucial to prepare your dahlias well. First of all, make sure that the dahlia plants are healthy and free of pests and diseases. Secondly, apply the right amount of organic fertilizer to the dahlia in autumn to enhance its cold resistance. Finally, before the soil freezes, water the dahlias once to help the plants store enough water.
3. Thermal insulation measures.
For ground-grown dahlias, heat preservation is the key to wintering. Before the soil freezes, the plant can be covered with an organic mulch with a thickness of about 10 cm, such as straw, leaves, etc. This not only prevents the soil from freezing too quickly, but also maintains the soil temperature and reduces the degree of frost exposure of the plants.
Fourth, control watering.
In winter, dahlias enter the dormant phase and their water requirements are greatly reduced. Therefore, it is necessary to control watering to avoid freezing the plants due to excessive moisture of the soil. When the soil is dry, you can water it properly, but make sure that the water can penetrate the soil quickly to avoid leaving standing water on the plants.
5. Prevention and control of pests and diseases.
In winter, although dahlias enter the dormant period, they can still be attacked by pests and diseases. Plants should be inspected regularly, and once signs of pests and diseases are found, timely measures should be taken to prevent and control them. A combination of biological and chemical control methods can be used to ensure plant health.
Sixth, spring recovery.
With the onset of spring, dahlias begin to grow again. At this time, the mulch should be removed in time to allow the plants to fully receive sunlight. At the same time, it is necessary to strengthen watering and fertilization to provide sufficient nutrients for dahlias to promote their strong growth. In the spring, the dahlias can also be properly pruned and shaped to remove dead branches and diseased leaves, making the plant more beautiful and healthy.
7. Precautions.
Avoid over-fertilizing: While spring is the growing season for dahlias, avoid over-fertilizing. Excessive fertilization can lead to plant growth and affect flowering quality.
Prevent lodging: Dahlia plants are tall and large, and lodging is prone to occur when they grow rapidly in spring. Fixation can be done with supports to keep the plant standing upright.
Timely division: Spring is the breeding season for dahlias, and it can be propagated at the right time. Plant healthy side shoots or rhizomes separately to expand the number of plants.
Control of spring pests and diseases: In spring, dahlias are susceptible to pests and diseases. Plants should be inspected regularly, and once signs of pests and diseases are found, timely measures should be taken to prevent and control them.
8. Conclusion. 
Through the introduction of this article, I believe you have mastered the key steps of overwintering ground dahlias. As long as you follow the above advice and give proper care and protection, the dahlia will surely bloom in the most beautiful flowers under the warm spring sun. Let's work together to protect the good times when the flowers bloom!