What if the leaves of sunflower turn yellow?

1. Rational watering

The stems and leaves of sunflower grow taller, and the nutrients and water needed by the leaves are mainly transported by the rhizome. Proper watering can speed up the absorption rate of the roots, which is beneficial to the growth of leaves, but if the soil is too wet, it will weaken the respiration of the roots, hinder the absorption of water, and eventually lead to the yellowing of leaves.

Too much water is not enough, nor too little. It needs enough water in the process of growing. If the soil is short of water for a long time, the necessary water for its growth can not be guaranteed, and the leaves will turn yellow.

Therefore, in normal times, it is necessary to reasonably control the amount of watering, not too much water, not too little.

two。 Avoid direct sunlight

Its normal growth needs enough sunlight, but it should be properly shaded when the sun is too strong in summer. during this period, if there is no shading, it is very easy to cause the leaves of the plant to be burned by the sun, which is the common sunburn disease in summer. the leaves turn brown and yellow. If effective measures are not taken in time, the whole plant will wither.

So in summer, you can move the plants into the shade or under the big trees, do not directly expose the sun.

3. Control of diseases and insect pests

Leaf mites, shell insects and other harmful insects are easy to infect. When its leaves are infected with shell insects or leaf mites, the pests will cause damage to the plant, and its leaves will begin to turn yellow. Once found, it should be treated with drugs in time, otherwise it may cause death.