What are physiological disorders in flowers and how to prevent and treat them?

During the growth of flowers, disorders caused by a lack of certain nutrient elements, or because the soil is too acidic or too alkaline, or because the temperature and humidity are too high or too low, the light is too strong or too weak, as well as pollution and other reasons, are called physiological disorders.

Common physiological disorders of flowers include:

(1) New leaves and the base stem grow too slowly or even do not grow, the lower leaves of the plant droop, and the leaf color becomes pale. This is caused by a lack of fertilizer. After supplementing nitrogen fertilizer several times, the symptoms can be improved.

(2) The branches are slender and spindly, the internodes are elongated, and the leaves are weak, large and thin, and pale in color. This is caused by insufficient light, so the sunshine duration should be gradually increased.

(3) The lower leaves of the plant curl, and the new leaves do not grow large. This is due to excessive light. Provide appropriate shade or move the plant to a place with weaker light.

(4) The leaves are wilted and soft, the leaf tips dry up, and the lower leaves fall off. This is caused by a lack of water. Check whether the potting soil is compacted and whether the roots have been bitten off by pests, affecting water absorption. Treat according to the cause, and at the same time make sure each watering is sufficient and thorough, and avoid half-watering.

(5) The branches and leaves wilt, the color darkens and even gradually becomes moldy and rotten. This is caused by too much water in the pot and a lack of air around the roots. Check whether the drainage hole at the bottom of the pot is blocked, control the frequency of watering, and ensure the drainage hole is unobstructed.

(6) The leaf margins curl and wrinkle, the tips dry up, and even the whole leaf withers. This is because the air is too dry or the temperature is too high. You should often spray water on the leaf surface, and place the flower pot in a sand trough containing water or often sprinkle some water on the ground around the flower pot to increase humidity and lower temperature.

(7) Yellow-brown patches appear on the parts of the leaves facing the sunlight, gradually fading outward, with white blister-like areas in the middle. This is caused by sunburn, so provide shade to protect from the sun.

(8) The branches and leaves grow excessively, few flower buds form, and moss appears on the clay pot. This is caused by too much nitrogen fertilizer. The frequency of fertilization should be reduced, and during the bud formation period, do not apply nitrogen fertilizer, only phosphorus and potassium fertilizers.

(9) The plant grows poorly, the leaves shrink, rot, and fall off, and there is a white crust on the rim of the flower pot and on the surface soil after it dries. This is due to excessive alkalinity. Remove the surface soil with the white crust, first pour a small amount of water to dissolve the salts in the soil, and after half an hour, rinse with a large amount of clean water to wash away the salts, or use vinegar water (one bowl of water plus one small spoon of vinegar) to neutralize the alkalinity.

(10) The roots are exposed inside the pot, the roots protrude from the bottom of the pot, and wilting appears shortly after watering, with few and small new leaves, or flowers and fruits dropping. This may be because the pot has not been changed for a long time or the pot is too small. At this time, replace it with a slightly larger flower pot.