How to judge the deficiency of flower nutrition

First, nitrogen deficiency

The leaves are yellow or even dry, small and thin. The stem is thin and broken with few flowers.

Second, phosphorus deficiency

Dark green leaves, slow growth. The veins of the lower leaves turn yellow and often purple, especially on the petioles. The flowers are small and few, the color is not good, and the fruit is not well developed.

Third, potassium deficiency

The lower leaves have spots, and dead parts often appear at the tip and edge of the leaves. The yellowing part extended from the edge to the middle, then the edge became brown and contracted down, and finally the lower and old leaves fell off.

Fourth, magnesium deficiency

In the late stage, the lower leaves often appear withered spots, which appear between veins. The veins are still green, and the leaf edge is curved upward or downward to form shrinkage. The withered spots often appear between veins in one day.

Fifth, calcium deficiency

The tip and edge of the tender leaf are rotten, and the tip of the young leaf is often hooked. The root system was dead before the disease. Terminal buds usually die.

Sixth, iron deficiency

The disease occurred in the new leaves, the veins between the leaves turned yellow, and the veins remained green. The disease spot does not often appear. When it is serious, the leaf edge and tip are dry and sometimes expand inward, forming a large area, only the larger veins keep green.

Seventh, manganese deficiency

The disease occurs in new leaves, and the spots usually appear, and they are distributed on the whole leaf surface. The very fine veins remain green, forming a fine network. The flowers are small and the colors are bad.