What are the ways to tell if flowers lack nutrients?

Whether in crops or flowers, nutrients are needed. Below, the editor will share with everyone.

With nitrogen deficiency, the plant is thin and weak, the branches are slender, long and hard, and the leaves and flowers are small. The leaf color gradually fades from deep green to pale from the old leaves to the new leaves, then red-purple appears, until they turn yellow and fall off. When the whole plant loses its green color, it shows that the flowers lack nutrients and need fertilizer. You can apply more decomposed human excrement and urine, cake fertilizer, barnyard manure, or fertilizers such as ammonium sulfate, urea, and ammonium nitrate to prevent and treat it.

With phosphorus deficiency, the leaves turn from dark green to purple-copper color, and the leaf veins (especially the petioles) are yellow with a purple tinge. Flower bud formation is difficult, the flowers are small, few, and pale in color, leading to poor fruit development and even early withering and falling off. This shows that the flowers lack nutrients and need fertilizer. You can apply more bone meal, fish meal, poultry manure, or superphosphate, ammonium phosphate, and potassium phosphate (a phosphorus-potassium compound fertilizer). Generally, a water solution of about 0.10% is used as a foliar top dressing.

With potassium deficiency, the plant is short and small, and the stems are soft and prone to lodging. The leaves are often wrinkled, and the old leaves show dark brown spots from the leaf tip along the leaf edge, while the area around the leaf turns yellow, while the center and the leaf veins remain green. This shows that the flowers lack nutrients and need fertilizer... You can apply more plant ash, a 1%-2% potassium chloride water solution (not to be used on bulbous and tuberous flowers), and a 0.30%-0.50% potassium nitrate water solution as a foliar top dressing. Inorganic fertilizers such as potassium phosphate can also be used.

With calcium deficiency, the young leaves are green and wrinkled, the leaf margins curl upward and have white stripes, flowering is hindered, and the new leaves are difficult to unfold or become diseased and distorted. This shows that the flowers lack nutrients and need fertilizer. About half a month before sowing or potting, apply an appropriate amount of calcium chloride in the soil, which can increase calcium (not to be used on acid-loving flowers). Calcium nitrate can also be used as a top dressing.

The plant does not grow vigorously. The old leaves gradually lose green and turn white from the leaf margins to the center from the bottom, spots of various colors appear on the leaf veins, and the whole leaf turns yellow. This shows that the flowers lack magnesium and need fertilizer. You can spray continuously 3-4 times with a 0.20%-0.40% magnesium sulfate water solution, with an interval of 7-10 days each time. For soil with severe magnesium deficiency, use 5-10 kg of magnesium sulfate per mu, mixed into the base fertilizer in autumn or winter and applied to the soil.

The young leaves begin to yellow from the leaf veins until the whole leaf turns yellow, and the root system develops abnormally. This shows that the flowers lack sulfur and need fertilizer.

With iron deficiency, yellowing occurs from the young leaves to the old leaves. For the control of sulfur deficiency and iron deficiency, a 0.30% ferrous sulfate water solution can be sprayed continuously 3 times, with an interval of 1 week each time. When spraying, the mist droplets need to be fine and even. At the same time, a 0.20% urea iron water solution can be used for foliar top dressing.