The main reasons for this situation are
1. During a long period of drought, the rose branches lose water. A long period of drought will not cause the rose leaves to fall, it will only cause the rose leaves to dry up. If a rose flower has experienced a long period of drought and we suddenly water it, the leaves of the rose flower will fall off.
This situation does not affect the growth of the rose. After the leaves fall, as long as management is strengthened, the remaining branches of the rose can still quickly produce new shoots and leaves.
2. If the leaves of rose flowers suddenly fall off due to excessive watering, it is most likely due to waterlogging in the root system due to excessive watering. Although the rose is a plant that likes plenty of water and fertilizer.
However, it requires good water and air permeability of the soil. If the soil becomes more sticky and becomes impermeable, excessive watering will easily cause the rose's roots to become stuffy, eventually causing the rose leaves to suddenly fall off.
Extended information:
There are certain things to pay attention to when watering rose flowers. It should be done when it is dry and wet. If it is not dry, do not water it. Water it thoroughly. Roses are afraid of flooding, so there should be no accumulation of water in the pot. Excessive water can easily cause root rot. Water should be watered once a day in mid-summer, and watering can be done when the surface of the pot soil turns white.
Be sure to water less during the dormant period in winter and keep it semi-humid. Rose watering varies depending on the season. Keep the soil moist during the winter dormancy period and not dry out. In spring, before the branches start to sprout and the branches and leaves grow, increase the amount of water appropriately and water once a day in the morning and evening.
It is necessary to increase the amount of watering during the peak growth season and flowering period. The high temperature in summer will increase the evaporation of water, and the plants are in a weak and semi-dormant state. Dryness and dehydration are most avoided. Water once a day in the morning and evening to avoid sun exposure. .