What are the morbid symptoms of lack of nutrients in orchids?

Magnolia is a precious indoor ornamental flower. The cultivation of Cymbidium is easy, but if it is not managed properly, it will lead to flowers and even poor plant growth. Therefore, rational fertilization is one of the important conditions for the cultivation of Cymbidium.

According to observation and research, when Magnolia lacks nutrient elements, it has the following performance:

When nitrogen deficiency, the plant growth is short and thin; the old leaves are light green, when the nitrogen deficiency is serious, the old leaves are yellow and red pigment appears, the basal old leaves gradually die from bottom to top, and the new leaves, flowers and fruits become smaller obviously.

In the case of phosphorus deficiency, the plant growth was inhibited, the leaves became dark gray-green, mixed with purple pigment; the leaves were slender, the basal leaves gradually yellowed and died, and the stems were short and thin.

When potassium is deficient, the leaf appears small yellow spots, the leaf tip turns yellow at first, then spreads to the base along the leaf edge, and gradually dries up and turns yellow, and when it is serious, the mesophyll tissue of the leaf vein will also dry up and die; the plant is short and the internodes are short; the disease first occurs on the old leaf at the base.

When calcium is deficient, the root tip of the plant will be destroyed and die. The root system is perishable, the young leaves can not extend, is linear, and the plant growth is stagnant.

Under sulfur deficiency, the plant lacks green, the leaf vein is yellow, the young leaf at the top suffers earlier than the old leaf, and the leaf is slender and grows slowly.

In the case of manganese deficiency, the middle and upper leaves yellowed, the leaf veins were green, but the mesophyll showed small yellow spots, seriously formed small brown spots, and the leaves became smaller.

In order to prevent the occurrence of deficiency of nutrient elements in Cymbidium, measures should be taken to increase fertilizer, increase luster and reduce water in winter and spring. The Beginning of Autumn is the golden season for the growth of Cymbidium, and thin fermented cake fertilizer and water can be applied in combination with watering every 20 days or so, so as to meet the growth needs of Cymbidium.

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