Why the leaves turn yellow

by Krystal Zheng

No matter what kind of plants is planted, maybe your plants have such a problem - the leaves of plants turn yellow. Many people will say that this is due to the lack of light, which hinders the photosynthesis of plants, so just use  LED full spectrum grow lights to supplement light. Yes, it’s true, but it is not 100% correct. Take “WEE” plants as an example, the following practices will cause their leaves to turn yellow.

Excessive or Lack of Watering

Excessive or Lack of Light

Insufficient Fertilization

The pH of Soil

Growth Environment

External Threats

Excessive or Lack of Watering

“WEE” plants only thrive in an effective dry and wet cycle, which means you have to water them at the right time. The performance of lack of water is that the tip of the leaf or the newly grown leaves first turn yellow or the color becomes dim, especially the buds that have just grown, which wilt before they spreading. Besides, the performance of excessive watering is that the old leaves of plants turn yellow, and gradually the new leaves will turn yellow, and then the edges of many leaves will become dry from yellow. And importantly, too much water will lead to root rot, and the lack of water will hinder the growth of plants.

Solution: closely monitor the growth of plants, and develop a good habit of recording plant growth diaries. It can more accurately summarize when it is appropriate to water, and prevent the bad situation from happening again.

Excessive or Lack of Light

It is a good choice to grow with LED lights, and LED full spectrum grow lights must be within the correct distance above the canopy to get the best effect. When LED full spectrum grow lights are too close to the top of the blossom, the buds and leaves will easily turn yellow and brown due to the strong light. On the contrary, the lack of light is a common problem for plants, and it will hinder the photosynthesis of plants, and cause the leaves of plants to turn yellow.

Solution: for lack of light, you can use LED full spectrum grow lights to grow your “WEE” plants. However, there are subtle differences in all kinds of LED full spectrum grow lights on the market today. Therefore, if you use LED full spectrum grow lights, you should locate the light in the best position according to the guidance given by the merchant.

 LED full spectrum grow lights

 

Insufficient Fertilization

The cultivation of “WEE” Plants requires adequate nutrition at a specific time. In the absence of fertilization, the old leaves of “WEE” plants will turn yellow first, and the tip and edge of the leaves will turn yellow. Or the surface of the leaves is originally very smooth, the back will become rough and uneven appearance.

Solution: for the selection of plant fertilizer, I suggest that the fertilizer for “WEE” plants should be selected as much as possible. Because most of them have customized tables and feeding schedules. You just need to read the dosage instructions on the fertilizer label carefully before use, and act according to the instructions.

The pH of Soil

Soil nutrients are very important for plants. The pH of soil should be controlled in 6.0-7.0 pH. When the pH of your soil is higher or lower than 6.0-7.0 pH, the leaves of your “WEE” plants will turn yellow due to the lack of certain nutrients in the roots.

Solution: in this case, you should use a high-quality pH solution and purchase a pH test pen. Adjust the pH value of the soil according to the actual situation, and the soil can contain basic nutrients, so that your plants can grow normally.

 LED full spectrum grow lights

 

Growth Environment

When the temperature is lower than 10 ℃, the “WEE” plants will be frostbitten or the leaves will turn yellow. Also, the growth environment with too high temperature will also lead to the leaves of “WEE” plants turning yellow. Whether indoor or outdoor, the high temperature will make the environment dry, thus affecting the normal growth of plants.

Solution: for the growth environment with low temperatures, I recommend to grow with LED lights. Because LED full spectrum grow lights can not only supplement light for your plants, but also improve the indoor temperature. For a growth environment with high temperatures, a fan can be installed in the growing shed to dissipate heat.

External Threats

As we all know, both indoor and outdoor planting are inseparable from the threat of pests. They can harm “WEE” plants, and the yellowing of leaves is one of the phenomena.

Solution: in the process of planting, it is impossible to isolate 100% of the insects. You can only try your best to prevent the harm of pests to your “WEE” plants. If you find pests on the leaves of “WEE”, you must be sprayed and sterilized in time. If it is serious, you should cut off the diseased leaves. But remember that trimmers must be disinfected before and after each pruning to prevent fungal infection caused by these pests.

 led full spectrum grow lights

 

If the leaves of your plants begin to turn yellow, you can’t just use LED full spectrum grow lights to save them. Because in the case of improper treatment, it will cause the plant leaves to fall off or even die. Therefore, you should analyze the reasons of leaves turn yellow, and find the best solution.


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