What Is White Sticky Stuff on Outdoor Plants?

If you take a look outside, there’s a good chance that you may have noticed some white sticky stuff on outdoor plants. Although it’s normal to be concerned about what this might be and how it can affect your plants, understanding the cause of the white sticky stuff can help you make an informed decision on how to proceed.

The white sticky stuff on outdoor plants is known as honeydew, which is a type of sugary substance that is excreted by sap-sucking insects like aphids or scale. These insects feed on the plant’s sap and then excrete this sticky substance from their bodies. In addition to leaving behind honeydew, these bugs can also cause yellowed leaves, stunted growth, and distorted leaves.

Honeydew can also attract other pests such as ants and wasps who are attracted to the sugary substance for food. These pests can further damage your plants by eating leaves and spreading disease. In addition, the honeydew itself can create an environment that encourages mold growth.

What Can You Do To Control The White Sticky Stuff?

The best way to control the white sticky stuff on outdoor plants is to control the underlying pest infestation. This can be done through a combination of manual removal of affected leaves and branches, as well as using an appropriate insecticide or pesticide designed specifically for controlling sap-sucking insects.

In addition to controlling the pest problem, it is important to ensure that your plants have adequate nutrition and water in order to remain healthy and fight off any potential infestations. This includes providing them with adequate sunlight and avoiding over-watering or under-watering them.


White sticky stuff on outdoor plants is caused by sap-sucking insects such as aphids or scale who excrete honeydew from their bodies. Controlling these pests is essential in order to prevent further damage from occurring due to honeydew attracting additional pests or creating an environment for mold growth. Taking the necessary steps to provide your plants with adequate nutrition and water will also help keep them healthy and better able to fight off any potential infestations.

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Chris Powell