Is it because of lack of fertilizer that the petunia leaves turn yellow and stop growing? Why are the petunias curling their leaves?

Petunia is a common flower. It is very similar to the familiar morning glory in appearance. Petunia is also very beautiful when it blooms. If you find that the leaves turn yellow during the planting process, it is still related to lack of fertilizer. However, applying too much fertilizer can also cause leaf curling.

The leaves of petunia turn yellow and stop growing. Is it because of lack of fertilizer?

It may be due to lack of fertilizer.

If the petunia does not have enough nutrients, its leaves will turn yellow and fall off, and the plant will not grow tall. For example, if the petunia lacks nitrogen, its leaves will grow small and slow. If the shortage is severe, the leaves will turn yellow. If the petunia lacks phosphorus or potassium, its root system will grow less and be underdeveloped, causing the entire plant to become smaller, and its ability to absorb nutrients and water will be weakened, and the leaves will turn yellow.

Before the flower buds grow, you can use nitrogen fertilizer as the main fertilizer, and you can use nitrogen-based compound fertilizer 2 to 3 times a month. When the petunia grows flower buds, fertilization should be mainly phosphorus and potassium fertilizers. You can directly use potassium dihydrogen phosphate 2 to 3 times a month.

What is the problem with petunia leaf curling?

It is usually caused by viruses, sticky soil, too frequent watering, and underdeveloped root systems.

Many people use clay for planting, which is too sticky and can retain water but not breathable enough. In this case, the soil should be changed or a substrate should be used. Be careful not to use dry substrate directly, but use clean water to make it semi-dry and semi-wet.

Virus leaf curl is usually caused by white rust and leaf spot. If it is newly planted, leaf curl is normal, and the nutrition is not keeping up. Just expose it to more sunlight and it will be fine after a few days.

Excessive fertilization, especially nitrogen fertilizer burning of leaf curl, can lead to excessive local fertilizer concentration in the soil, causing root burns and leaf edge curling. Water-soluble flushing is an important measure to reduce fertilizer damage.

In addition, if the temperature continues to be below 10℃, the leaves will be damaged by the cold and the leaves will bend downward. In the cold season, it is recommended to move indoors for heating or temporarily increase the temperature to promote growth.

How to grow petunias for the first time

1. Don't water heavily during the seedling stage. Water thoroughly once, and then water again when the soil at the bottom of the pot is dry. How do you know when the soil at the bottom of the pot is dry? Insert a bamboo chopstick into the pot for a while, take it out and check. If the surface of the chopstick is moist, don't water it. If it is dry, you can water it.

2. During the growing season, pinch the tip, pinch the tip, pinch the tip, and be willing to pinch even when there are flower buds, so that it can continue to branch. Fertilize once every two weeks in the middle. When the branches and leaves fill the flowerpot, you can stop pinching the tip.

3. Flowering period is the most beautiful time. Be careful not to expose it to the sun or rain.