Common pests in winter greenhouses include aphids, spider mites, whiteflies, and fungus gnats. These pests thrive in the warm, humid environment of a greenhouse, even during colder months. To control them, regularly inspect plants for signs of infestation, such as discolored leaves or webbing. Natural predators like ladybugs or predatory mites can help keep aphid and spider mite populations in check.
Sticky traps are effective for monitoring and catching flying pests like whiteflies. For fungus gnats, reducing overwatering and improving drainage helps limit their breeding environment. Insecticidal soap or neem oil can be used to treat affected plants, but it's important to apply them according to instructions to avoid harming the plants. Maintaining good hygiene in the greenhouse, including removing plant debris and cleaning surfaces, also helps prevent pest buildup.
