Reason: Hydrangea like to grow in acid soil with good drainage, if the soil planted is alkaline soil, and poor drainage, it is easy to cause poor growth, or even rotten roots.
Solution: replace it with acid soil with good drainage in time. The soil rich in humus is the best. The suitable soil can help it grow more
Cause: excessive watering during daily maintenance, a large amount of water will not be discharged from the basin soil, once there is water, the root of Hydrangea can not breathe normally, which will lead to rotten roots.
Solution: at this time, we must reduce the amount of water, water scientifically and reasonably. Before watering, we can see the color of the pot soil. If it becomes lighter or cracks appear, then we should water it properly. When watering, it's best to pour it through, not only half of the pot soil.
Reason: reasonable fertilization is more conducive to its growth, if the amount of fertilization is too large, it will burn the root of Hydrangea, and lead to root rot.
Solution: apply proper amount of fertilizer. Do not apply too much fertilizer. Give enough nutrients during its growth. Apply fertilizer once every 15 days or so. It will help Hydrangea grow better and flowers will bloom larger. After rotten root, the rotten part should be cut off, then disinfected and replanted.
