Lan Ye tells you what kind of fertilizer you lack.

Orchid lack of what nutrition, will be in its leaves or orchid plants on the performance, through observation, can be symptomatic fat, so that fat is no longer blind.

(1) the new leaves are shorter, narrower and thinner than the old ones, with yellowish color, lack of luster and lack of nitrogen fertilizer.

(2) the leaf bud elongates slowly, does not root for a long time, the leaf margin rolls slightly, and is short of phosphate fertilizer.

(3) the leaf green and leaf tip turn yellow (first the old leaf then the new leaf), and then turn brown; the main lateral vein of the leaf is thin; the leaf is soft and easy to bend; in case of strong light and low temperature, the new leaf appears micro-dehydration, lack of potassium fertilizer.

(4) the old leaves are yellow, and the leaf tips and edges of the middle-aged leaves are yellow and curly to the leaf surface (commonly known as the edge of copper gongs), lack of magnesium.

(5) the leaves are withered, green-lost and less glossy; although there is proper shade, there are sunburn-like markings and spots in the spots; flower buds are not developed; manganese deficiency

(6) the leaf tip is hooked (except those with variety characteristics), which is common in acid soil and plants with acid fertilizer, and is deficient in calcium.

(7) the mesophyll of the young leaves turned yellow to white, and the veins, margins and tips of the middle leaves showed scorched brown spot necrosis and iron deficiency.

(8) the middle part of the bottom leaf showed pure rust-like spots, and gradually extended to both ends of the leaf; the petiole ring of the new plant was obviously lower than that of the old leaf, and was zinc deficient.

(9) the leaf tip lost chlorosis, turned gray gradually, and expanded to the whole leaf, stagnant growth and copper deficiency.

(10) the base of young leaves was injured, the petiole ring was brittle and easy to break, the number of flowers decreased obviously, the buds opened slowly, and the flower endurance period was obviously shortened and boron deficiency after flowering.

(11) without the application of dwarftin, the new plants will be obviously dwarfed, and the old leaves will lose chlorosis, resulting in withered yellow, wilting to necrosis and lack of molybdenum.