How to care for petunias after pruning? What causes petunias to curl their leaves?

Petunia likes a warm and sunny environment, is not frost-tolerant, and is afraid of rain and waterlogging. If the temperature is below 4°C, the plant will stop growing. In summer, it can tolerate high temperatures above 35°C. Loose, fertile, and well-drained sandy loam is suitable. Petunia is a long-day plant that requires plenty of sunlight during its growth period. Under normal light conditions, it takes about 100 days from sowing to flowering. Now, let's learn about the relevant knowledge with Encyclopedia Knowledge Network!

Contents of this article

1. How to care for petunias after pruning?

2. What is the reason for petunia leaf curling?

3. How can you grow petunias vigorously?

How to care for petunias after pruning?

1. Proper lighting

After we prune the petunia, we must maintain proper light, because it is a plant that prefers sunlight. After pruning, it needs to grow new branches and leaves through photosynthesis, but it cannot be placed in an environment with too strong sunlight, otherwise the leaves will be sunburned.

2. Maintain temperature

After we prune the petunias, we must also maintain a good temperature. Petunias like a warm growing environment. We need to keep the temperature within a suitable range, not too high or too low, so that the petunias can grow better.

3. Appropriate fertilization

After pruning the petunia, we need to add fertilizer to it appropriately so that the petunia can have enough nutrients to grow new branches and leaves. However, when fertilizing, we must control the concentration of the fertilizer to avoid burning the roots due to excessive fertilizer concentration.

What causes petunia leaf curling?

1. Hormone poisoning

Assuming that you spray the flowers every few days, then if it is winter, the temperature is relatively low, and the weather is not very good, there is no condition for the virus to spread, and it is very likely to be hormone poisoning.

If it is hormone poisoning, then we should stop spraying the flowers immediately and wait until the weather is better. During this period, we should apply some useful medicines. The new leaves that grow after injection are normal, but the old leaves will not recover.

Once hormone poisoning occurs, stop spraying the flowers immediately and apply Bihu. When the leaves curl up, it will affect photosynthesis.

2. Soil clay problem

Many people use clay, which is too sticky and retains water but is 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. Use clean water to make it semi-dry and semi-wet.

3. Is it newly planted?

It is normal for newly planted plants to have curled leaves, as they are not getting enough nutrition. Just expose them to more sunlight and they will recover after a few days.

4. Lack of water

If watering is not timely, add some water and put it in a cool place to slow down.

5. Watering too frequently

This should also be noted. Everything has a limit, never too much. Just like applying foliar fertilizer to some crops, it is worse if you apply too much, because the root system will become dependent. You must control the degree.

6. Too much fertilizer, especially nitrogen fertilizer

There are many factors that cause leaf curl. Plants cannot speak, but they can express themselves. We also need to judge based on other phenomena, such as whether the leaves are yellowing, whether there are leaf spots, etc.

How to grow petunias vigorously?

1. Selection of potting soil

The flowerpot used for petunia requires to be larger, about 20-30cm in diameter, and maintain good air permeability. Flowerpots with poor air permeability cannot be used. The soil is also very critical. It can grow vigorously in suitable soil. You can choose nutrient-rich sandy loam and use plastic foam or gravel at the bottom of the flowerpot.

2. Adequate lighting

Only when there is more sunlight in the growing environment can more nutrients be produced and growth be promoted. It is a plant that likes light very much. It should see more sunlight in spring, autumn and winter. It can be raised on a balcony with good light, or directly outdoors. However, in summer, we should pay attention to shade to avoid direct sunlight burning the leaves and delicate flowers.

3. Keep warm in winter

The suitable temperature for growth is about 15-25℃. The temperature in winter is very cold. You can put it indoors to help it spend the winter safely.

4. Water at the right time

Petunia likes a humid growing environment and is afraid of drought. Therefore, pay attention to watering and keep the soil slightly moist. There should be no stagnant water to cause root rot. Be careful not to use alkaline water for irrigation. Add a small amount of ferrous sulfate to the water.

5. Fertilize regularly

Petunias require a lot of nutrients to grow. Base fertilizer needs to be added when planting in pots, and fertilizer should be applied once every half a month during the growing season.

6. Preventive measures

Petunia is a vine plant, so we should be careful to prune and remove branches that are not conducive to growth.