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Why Are My Petunias Sticky? (Explained)

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Petunias are common colorful flowering plants. You might have seen these plants in gardens. Even you might have these plants in your garden.

So, if you ever touched a petunias plant, you might have known already about the skin type and texture of this plant. But sometimes, you might have noticed this plant’s stickiness.

So, you might be confused about why your petunias are sticky. Different reasons can be responsible for making a plant excessively sticky.

But some plants have natural stickiness. So, you have to know details about petunias whether their stickiness is normal or not. If your petunias are highly sticky, you have to investigate the reasons.

Are petunias supposed to be sticky?

Yes, petunias are supposed to be sticky. These plants have natural stickiness. If you have ever touched a petunias plant, you might have felt the stickiness. Sometimes, the stickiness is light and you can’t notice it after touching it.

But you can see the natural stickiness if you pinch a stem of petunias. For example, if you pinch a portion of the petunias stem, you will feel the stickiness. But if the petunias are very sticky, that petunias might have a problem.

So, petunias are supposed to be sticky naturally. But if you see that the petunias plant is excessively sticky, there might be a problem in the plant.

Why are my petunias sticky?

Generally, petunias are sticky by their nature. If you ever pinched a petunias stem, you might have felt its stickiness. But if the stickiness is at an high level, the petunias plant might have a problem. For example, too much stickiness of petunias might indicate an invasion of aphids.

However, if you want to know details about the stickiness of the petunias plant, you have to know the underlying reasons. So, let’s see why your petunias are sticky.

Natural texture:

Your petunias are sticky because they are supposed to be sticky. Generally, petunias plants are naturally sticky. They produce a gooey material via the stem tissues. So, this material travels through the foliage.

So, the stems and flowers of petunias plants emit a slimy material. Generally, this material is supposed to protect the plant from insects. So, your petunias are sticky for their nature.

Invasion of aphids:

Generally, the sticky and slimy material of petunias protects the plants from the invasion of aphids. So, the more the coming of aphids, the more gooey materials will be produced from the stems of petunias.

So, if you notice that the petunias are producing an high level of stickiness, that means aphids invaded the plants.

Invasion of insects:

Some other insects might invade your petunias plants. Generally, when the petunias emit gooey material from the stem and get mixed up with the hairy texture of the stem, it attracts some insects.

So, when the insects invade petunias, more sticky material will produce to protect the plant. So, if other insects invade the plants, they will also produce sap that will make the leaves and stems of the plants sticky.

How to treat sticky petunias?

Many people don’t like to grow petunias in their gardens for the stickiness of petunias. The natural stickiness of petunias is bearable. But sometimes when the stickiness is very high, it indicates some problems. So, let’s see how you can treat sticky petunias.

Home remedy for aphids:

Sometimes, you can apply a home remedy to prevent the invasion of aphids. So, if you can prevent aphids, you can also treat sticky petunias. Because you might know petunias will produce more sticky material if aphids invade them.

So, you can use mix liquid soap with water and spray the mixture on the affected areas to treat aphids. This way, aphids will go away and the petunias will not emit too much sap from their stems.

You can also spray the high-speed flow of water with a garden hose. This will remove aphids from the petunias. Gradually, the petunias will become less sticky.

Treating other insects:

You can also repel other insects that are causing petunia’s stickiness. For example, you can add 5 tablespoons of oil with one gallon of water and then apply the solution to the topside of the foliage of the petunias.

This will repel other insects from the petunias. Moreover, you can also use commercial repellents that will keep the insects away. This way the insects will not stick to the petunias and less gooey material will produce.

Are petunias susceptible to aphids?

Yes, petunias are susceptible to aphids. Generally, aphids invade the green portions of these plants. For example, leaves and stems are the common places aphids invade.

Some fertilizers enhance the growth of petunias quickly. Quickly grown petunias are more susceptible to aphids. Generally, slow-growing fertilizers are good to prevent the invasion of aphids.

Aphids are the common reason why some petunias are very sticky. But healthy petunias are less susceptible to aphids. Because petunias that get regular water and sunlight will remain healthy and free from the invasion of aphids.

Can petunias recover from aphids?

Yes, petunias recover from aphids. Sometimes, the invasion of aphids is so excessive that you can’t keep petunias healthy anymore. Sometimes, you might need to apply something to the plant to treat aphids and recover the petunias.

But sometimes, the plants don’t even need to apply pesticides on them. You just need to water the plants regularly. Moreover, if you apply a water flow on the petunias, they will recover from the aphids.

Generally, the use of pesticides will repel aphids from the petunias. Initially, you might think that petunias will not survive the invasion of aphids. But gradually, petunias will survive aphids and recover from the problem.

What insects and aphids invade petunias?

Aphids are common insects to invade petunias. But other insects also invade petunias and create different problems for the plants. So, let’s see what insects and aphids invade petunias.


Generally, mites invade petunias often. Among different types of mites, cyclamen mites invade petunias the most and also damage the most. These mites are attracted by the gooey material produced by petunias.

Moreover, treating these mites is pretty difficult. Even sometimes, pesticides don’t work well. So, professionals treat these mites with warm water. If you want to repel these mites from petunias, you should follow the right instructions.


Like mites, leafminers are another insects that invade petunias. Treating these insects is also pretty difficult. These insects live on the sap produced from petunias.


Caterpillars also invade petunias. You might not notice them easily because of their green color. Generally, they invade petunias in summer.

Petunia aphids:

Petunia aphids are the most common insects that invade petunia. They make the plants stickier than normal. Moreover, the invasion of aphids might bring other problems to the plant. But repelling aphids is pretty easy.

You need to use a flow of water to remove aphids from petunia. Otherwise, you can use soapy water on the plants.

How do you keep petunias from getting sticky?

Excessive stickiness is abnormal for petunias. Though petunias are naturally sticky, you can keep petunias from being too much sticky. So, let’s see how you can keep petunias from getting sticky.

Preventing aphids:

You might know aphids make petunias stickier than normal. So, if you can prevent the invasion of aphids, petunias will also not become excessively sticky.

You can use a water line to clean the petunias regularly. But you don’t need to water daily, you can water the plants once a week

This water flow will keep the aphids away. But you should ensure a good drainage system. Otherwise, over-watering will affect the plants.

Preventing other insects:

Generally, preventing insects before invading is pretty difficult. Still, you have to take care of the plants to keep them away from insects.

Whenever you notice any trace of insects in a specific area, you have to remove that area from other plants. You can also use pesticides to repel insects from a specific area.

Avoid over-watering:

Over-watering will cause many root diseases and problems of petunias. This will lead to an invasion of insects or producing sticky materials more.

So, you have to avoid over-watering petunias. Moreover, keep the plants in a good drainage system. To avoid over-watering, you can water petunias once a week.

Final Thoughts

If you have noticed that your petunias have a sticky texture, it’s normal. Generally, petunias stems produce a sticky material and this sticky material travels through the leaves and stems. But sometimes, you might notice excessive stickiness. This indicates the invasion of aphids or insects.

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