When it comes to fertilization, people often refer to nitrogen, phosphorus and potassium, but fertilizers are far more than these kinds, including magnesium, copper, manganese, calcium, iron, zinc, copper, boron, etc. the symptoms of orchids are different due to the lack of each element. Let's look at them together!
Nitrogen mainly promotes the growth of leaves. When the nitrogen element is deficient, the new leaf obviously grows poorly, which is shorter, narrower and thinner than the old leaf.
Solution: root irrigation with potassium sulfate compound fertilizer solution, or spraying leaves with urea solution in the evening, once every 3-5 days, three times in a row, the new leaves will slowly return to normal.
Phosphate fertilizer can promote the growth of leaf buds. When the orchid is short of phosphate fertilizer, the growth of leaf bud is slow, the root is not long, and the leaf margin will curl.
Solution: root was irrigated with potassium superphosphate leaching solution twice a time in 10 days. Or spray foliar phosphate fertilizer once every 3-5 days, three times in a row.
The lack of magnesium in orchid plants will lead to yellow leaves. Especially for the old leaves, the tip and edge of the leaves will be yellow, and the leaf surface will be curly.
Solution: spray 0.5% magnesium sulfate solution on the leaves in the evening, spray once every three or five days, spray three or five times continuously, and then correct.
The lack of potassium in orchids shows that the edge and tip of leaves turn yellow, the old leaves turn yellow at the beginning, and gradually spread to the new leaves, and gradually turn from yellow to brown. And the leaves of the plant are soft and easy to bend. In case of strong light or low temperature, the leaves will be dehydrated.
Solution: first, use 0.5% potassium sulfate solution to pour roots and spray leaves, or remove vegetation ash.
If the orchid lacks manganese, it is easy to be sunburned. Although it has shade, there are still sunburn like spots on the leaves, and there are spots in the spots, and the flower bud is not developed. Neutral, calcareous and sandy soils are prone to manganese deficiency.
Solution: spray 0.3% manganese sulphate solution on the leaves for 3 times, then it can be corrected.
The lack of calcium in orchid showed that the tip of leaves was hook shaped, which seriously affected the plant shape.
Solution: root can be poured once with 1.0% lime solution, or it can be poured once with 3% calcium powder solution for livestock, which can be corrected.
The iron deficiency of orchid mainly showed that the leaves of young leaves showed yellow and white, and the veins and tips of middle leaves showed brown spots.
Solution: spray 0.5% ferrous sulfate solution on the leaves once every 3 days, two or three times in a row, and then correct.
The zinc deficiency of orchid mainly showed that rust spots appeared in the middle of leaves at the bottom and gradually extended to both ends. The petioles of new leaves were significantly different from those of old leaves.
Solution: spray 0.1% zinc sulfate solution on the leaves once every three or five days for three times, and then correct.
The lack of copper in orchid mainly shows that the tip of the leaf will lose green, turn gray white, and gradually expand to the whole leaf, and the growth will gradually stagnate.
Solution: spray with 0.2% copper sulfate solution once every 7 days, spray twice continuously, and then correct.
The boron deficiency of orchid showed that the base of young leaves was injured, and the ring of petiole was brittle and easy to break. The flower bud bloomed slowly, the number of flowers decreased significantly, and the growth of plants decreased significantly after flowering.
Solution: spray 0.3% borax or boric acid solution once a week, three times in a row, and then correct.
The Mo deficiency of orchid showed that the new plants would also obviously dwarf and grow not high; the old leaves lost their green color, so that they withered and withered to necrosis.
Solution: spray with 0.1% ammonium molybdate solution once every 3 days and three times in a row, then correct.
