Grapes absorb different elements in each growth cycle, and when they lack certain elements, they will show corresponding symptoms on their leaves. A large number of field observations show that the yellowing caused by grape element deficiency disease is mostly related to the lack of iron, potassium, magnesium, boron and other elements.

● Generally, it will not happen in the whole park, and there is also a process for leaves to turn yellow.

● It is related to the fertilizer demand characteristics of grapes, such as iron deficiency symptoms before and after flowering; Potassium deficiency symptoms are easy to appear in the fruit discoloration period.

Drought caused the grape leaves to turn yellow.

cause analysis

Yellowing caused by grape deficiency is a physiological disease. Conventional remedies are mostly insufficient to supplement nutrition, and the effect may not be significant. In fact, yellowing of leaves is only a symptom of this disease. To solve the yellowing caused by insufficient nutrition, we need to find the essential reason.