1. When the growth of flowers lacking nitrogen fertilizer is blocked, the leaves will be smaller and dim. Moreover, the leaves grow very sparse and are easy to fall, which affects the photosynthesis of flowers, resulting in poor plant growth and development, less branches and smaller fruits

2. If the growth of flowers lacking phosphorus fertilizer is inhibited, the plants will become shorter. The leaves will become dark green but dull, and will produce purple spots, which will eventually dry and fall off

3. Plants lacking potassium fertilizer have brown spots and abnormal wrinkles on their leaves, and the edges of their leaves will curl or even wither as if they had been burned by fire

4. The growth of flower roots lacking calcium will be affected, the roots will become more and shorter, and the root tips will rot due to damage

5. Plants lacking magnesium will cause many diseases of flowers, such as yellowing disease, green deficiency disease and white flower disease. The leaves below the plant will gradually change from green to yellow, and will gradually spread upward. The veins will turn yellow gradually until the leaves die

6. The upper tender leaves of flower branches lacking iron will be damaged. If the iron deficiency is serious, all the tender leaves will turn yellow and white or even fall off

7. The leaves of manganese deficient plants gradually turn pale and then gray. Brown spots will also appear at the leaf tip, and even spread to other parts of the leaf. Until finally, the leaves withered, the plant growth was blocked and could not blossom and bear fruit