What if the leaves of evening primrose turn yellow?

Nocturnal incense is also known as nocturnal fragrance, night orchid, nocturnal clove, thousand-mile incense, etc. it is a weak rattan shrub of the family Acanthaceae, with fragrant flowers, especially at night, and is often cultivated for ornamental use. But when planting, there is often a yellowing phenomenon in the leaves. I don't know what to do? Next, let's take a look at the yellowing leaves of night incense.

Too much watering causes yellowing

The tender leaves at the top of the evening incense are yellowish, the old leaves are gradually yellowing, and the new shoots are shrinking. This is because too much watering, rain or too much watering leads to excessive wetness in the basin, lack of oxygen in the soil and rot of the beard roots. The correct way is to loosen the soil frequently and control watering.

Lack of water causes yellowing of leaves

The color of the top leaves of night incense is normal, but the lower leaves gradually dry yellow and fall off upward, which is generally due to the fact that the potted soil is too full to water for a long time, resulting in the aging of the branches of the lower leaves. The excess basin soil should be properly removed and properly watered to keep the soil moist.

Lack of fertilizer causes yellowing of leaves

The leaves of evening primrose are thin and tender and yellowish, which is generally due to the fact that the flowers are big and the pots are small or have not changed the soil for a long time, and the fertilizer is insufficient. Fertilizer and water should be increased gradually, but be careful not to be too thick. The potted flowers are changed once every two years, and the bonsai trees are changed every four years. When changing the pots, add a small amount of base fertilizer to the bottom of the pot, and change part of the new soil.

Fertilizer damage causes yellowing of leaves

Night incense appears concave and convex, the new leaves are thick, and the old leaves turn yellow, which are mostly caused by fat. Should be watered frequently, suspend fertilization, sow some rapeseed or other seeds in the basin, pull out the seedlings after emergence, in order to consume the fertility in the basin.

Diseases and insects cause yellowing of leaves

Nocturnal incense has yellow spots due to the damage caused by shell insects. The leaves are rough, dry and yellow, and can be sprayed with 70% trichlorfon 1000 times or 40% dimethoate with 2000 times water due to the damage caused by red spiders. The leaves caused by the virus are yellowing and will quickly spread into pieces, so they should be removed and burned in time, and then sprayed with carbendazim or Bordeaux solution to prevent and cure them. Don't spray too much, or there will be drug damage.

Yellowing caused by lack of light

Nocturnal incense is easy to turn yellow when it is placed indoors where it has not been in the sun for a long time. Other sunny ones such as jasmine and white orchids will have yellow leaves if the light is not enough. On the contrary, some evergreen, golden bell and pearl orchids that like cool environment will fall off if they are exposed to high temperature and shaded improperly.

Conclusion: what to do with the yellowing of night incense leaves is introduced here. We should know that there are many reasons why the leaves of night incense flowers are yellow, and the characteristics of yellow are also different, so we should make an analysis according to the specific situation, and then make a judgment and disposal after comparison.