In order to promote the healthy growth of rose and improve the root system, it is necessary to change the pot for 2-3 years. The time of basin changing is flexible and there is no fixed time requirement. Try to choose around March in spring. The climate is suitable for later growth recovery. Pay attention not to choose before flowering and flowering.
Before changing the basin, stop watering to control the water and protect the root. Select the plants in good condition, first use tools to turn around the flowerpot, and then dump the flowerpot on the ground. Slowly grasp the root of the plant with one hand, and then pat around the flowerpot with the other hand to take out the whole shrub rose. Soak it in water, remove the soil from the root, trim it properly, and cut off the old and rotten roots on the root.
The growth of rose needs a suitable substrate. Choose a proper flowerpot before changing the flowerpot. Then, the soil is prepared with garden soil, perlite and vermiculite, and peat soil and plant ash can also be added to increase the softness.
The flowerpot is filled with soil, the arranged rose is planted, the root is buried in the soil, and the water is poured immediately after the basin is changed to play the role of colonization.