Hungry flowers have signs
Nitrogen deficiency: mainly in the whole plant and the old leaves. From the whole plant, the performance was poor, the stems were thin, and the leaves were thin, thin and pale green. The lower old leaves appear pale yellow at the beginning, and then dry and brown, but the dead leaves do not fall off.
Phosphorus deficiency: The whole plant was dark green. Some flower petioles have a purple phenomenon, plant growth is retarded, yellowing occurs between the old veins of the base, and dead leaves are easy to fall off.
Potassium deficiency: The leaves of the old leaves of the flowers and trees have yellow, brown, purple, and other color spots (due to the different flower species). The leaf tip and leaf green tissue are scorched and curled downwards, and the yellowing phenomenon extends from the leaves along the center to the center. After the leaves wither, they easily fall off.
Iron deficiency: mainly reflected in the new leaves, but the top buds do not die, which is characterized by the appearance of yellowing in the new leaf mesophyll tissue. However, the veins are green and generally no withering occurs. If there is a long period of iron deficiency, the tips of leaves and leaves will gradually wither and expand inwards, while the large veins will remain green.
Calcium deficiency: mainly on new leaves. The top buds of calcium-deficient plants are prone to death, and the tips of the leaves and leaves are dead; the tips of the leaves are often bent into hooks, and the roots are necrotic, and the calcium-deficient plants are dead.
Magnesium deficiency: The leaf tissue of the old leaf of the base gradually turns from green to yellow, but the veins are still green. The leaves curl up or down, and the late leaves often wither.
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