Clover Mites

If you notice tiny, reddish-brown, greenish, or yellow-orange specks crawling on windowsills, walls, or other surfaces inside your home, you might have a clover mite infestation. These mites often appear in large numbers, especially in the spring and fall. They can enter homes through small openings around windows and doors, and they leave a red stain when crushed.

Clover mites are very small, about 3/100” in length (roughly the size of a pinhead), and are often red, but may also be reddish-brown, green-brown, or yellow-orange. Examining clover mites through a microscope, you would see they have an oval body and their front pair of legs are much longer than the others, giving them a distinctive appearance. These legs are often mistaken for antennae.

No, clover mites are not dangerous to humans or pets. They do not bite or transmit diseases. Their primary nuisance is the red stain they leave when crushed, which can damage surfaces like walls, furniture, and fabrics.

Clover mites do not cause structural damage to houses. The most significant issue they pose is the potential staining from their body fluids when they are crushed. This can be particularly troublesome on light-colored surfaces.

Clover mites are attracted to well-fertilized lawns and gardens with plenty of vegetation. They feed on grasses and a variety of other plants. They may enter homes in large numbers during changes in weather, such as heavy rains or excessive heat, seeking refuge from outdoor conditions.

To prevent clover mites from entering your home, create a barrier around your house by removing vegetation within 18 to 24 inches of the foundation. Use materials like pea gravel or mulch in this strip. Seal cracks and crevices around windows, doors, and foundations to block their entry points. If they do enter your home, vacuuming is an effective way to remove them, but avoid crushing them to prevent staining.

Clover mites feed on a wide variety of plants. Their diet includes lawn grasses, clover, dandelions, strawberries, and ornamental flowers. They suck the sap from these plants, which can sometimes cause minor damage like silvery streaks on the leaves, but generally do not harm the plants.

Clover mites reproduce parthenogenetically, meaning all individuals are female and reproduce without fertilization. Each female lays about 70 eggs, usually in protected, sunny areas. The eggs hatch in the spring, and the mites go through a larval stage and two nymph stages before becoming adults. They can produce several generations per year, especially in favorable conditions​.

1. Clover mites are more closely related to spiders and ticks than to insects.
2. Despite being a nuisance, clover mites do not reproduce indoors, as they need outdoor plants to survive.
3. They are particularly sensitive to temperature and are most active during cooler periods in spring and fall​.
4. Clover mites play a role in the food chain by serving as prey for various predatory insects like ladybugs and spiders. This ecological role helps maintain the balance in their habitats​.
5. Since World War II, the prevalence of clover mites as household pests has increased, likely due to the rise in the use of lawn fertilizers. Their presence is more common in homes with well-maintained and heavily fertilized lawns.
6. Clover mites are found across every continent except Antarctica. They thrive in various environments, from lush gardens to urban areas.
7. Clover mites belong to a group of mites that have existed for millions of years. Their adaptability and resilience have allowed them to survive and thrive through numerous climatic changes over millennia.