Argentine Ants: Why Hawthorne Kitchens Get Overrun in Summer

One colony, many blocks

The small brown ants that stream across Hawthorne counters and windowsills are Argentine ants. What makes them so hard to shake is their structure: instead of one nest defending its turf, they form massive interconnected supercolonies with many queens that can span entire neighborhoods. The trail in your kitchen is a thread of something much bigger outside.

They nest outdoors under mulch, pavers, potted plants, and along irrigation lines, and Hawthorne's flat, densely built yards give them endless nesting room.

Why summer is worst

Argentine ants follow moisture. Through the warm, dry months, outdoor water sources dry up and the ants push indoors to kitchens and bathrooms for water, along counters, baseboards, and sink edges. A rainy spell can send them inside too. Homes and apartments across the flat neighborhoods all see it.

They are not just a nuisance. Foraging trails contaminate food surfaces and can protect other pests like aphids and scale outdoors.

Bait the colony, don't spray it

Here is the mistake most people make: they spray the visible trail. Repellent sprays split an Argentine colony into new satellite nests and multiply the problem. The colony survives because the queens are outside and untouched.

The fix is bait the workers carry home, plus a non-repellent perimeter treatment that ants cross without detecting and spread nest to nest. Add trimming plants off the house, fixing leaks and irrigation, and sealing entry points, and the colony gets smaller instead of splitting. A local exterminator sets this up for the whole property.

Related services