Ant Problem? Stop It Early.
Content
Ants are a unique challenge for Southern California homeowners because they live in large colonies and will return as long as the colony is active. They use pheromone trails to communicate where to find food and water so other ants can find the source, which is why trails reappear even after you spray the ones you see. Many species build nests under the foundation of a home for shade and moisture. In those cases DIY products will likely be ineffective because they can’t reach the colony. If ants keep returning, it’s best to get professional help. Schedule a free inspection.
Indoor Ant Products
TERRO Liquid Ant Baits
What it is and how it works: Pre-filled liquid bait stations that attract foraging ants, which carry the bait back to the colony for full elimination.
Why we love it: Easy setup, highly effective on Argentine and odorous house ants commonly found across Southern California kitchens and pantries.
Our Rating: ⭐️⭐️⭐️⭐️⭐️ 5/5
Cost: ~$13
Ease of use: ⭐️⭐️⭐️⭐️⭐️ 5/5
Pros: Targets colony, easy and clean setup, great for kitchens
Cons: Keep away from pets/kids; replace when emptied
Most Effective for: Pantries, counters, visible ant trails
Combat Ant Killing Gel
What it is and how it works: A syringe-applied gel bait for cracks, gaps, and hard-to-reach areas. Ants feed and share with the colony for lasting control.
Why we love it: Precise placement where sprays can’t reach; strong choice for recurring trails along baseboards and behind appliances.
Our Rating: ⭐️⭐️⭐️⭐️ 4.5/5
Cost: ~$6
Ease of use: ⭐️⭐️⭐️⭐️ 4/5
Pros: Precise placement; effective on stubborn trails
Cons: Can be messy if over-applied; check and refresh
Most Effective for: Cracks, behind appliances, baseboards
Mighty Mint Peppermint Oil Spray
What it is and how it works: Plant-based repellent using peppermint oil to disrupt trails and discourage entry without conventional pesticides.
Why we love it: Family-friendly option with a pleasant scent for light activity and prevention, indoors or outdoors.
Our Rating: ⭐️⭐️⭐️⭐️ 4.2/5
Cost: ~$22
Ease of use: ⭐️⭐️⭐️⭐️ 4/5
Pros: Natural, pet- and child-friendly; pleasant scent
Cons: Requires reapplication; best for prevention/light activity
Most Effective for: Entry points, window sills, baseboards
Harris Borax Powder (DIY Natural Bait)
What it is and how it works: Borax interferes with ant digestion and is carried back to the colony when mixed with sweet attractants such as sugar or honey.
Why we love it: Natural, pet- and child-safe when used as directed, and customizable for different ant species and locations. It is also one of the cheapest options for DIY products available.
Our Rating: ⭐️⭐️⭐️⭐️ 4.6/5
Cost: ~$15
Ease of use: ⭐️⭐️⭐️⭐️4/5
Pros: Natural, affordable, customizable bait
Cons: Requires mixing and patience; keep out of reach
Most Effective for: DIY bait placements near trails (out of pet/kid reach)
DIY sweet bait: Mix 3 parts sugar with 1 part borax. Add a few drops of water to make a syrup. Place a small amount in bottle caps or on wax paper near trails, away from pets and children. Refresh every 1–3 days until activity stops.
EcoVenger Ant Killer & Crawling Insect Spray
What it is and how it works: Botanical-based contact and residual spray for ants and other crawling pests inside the home.
Why we love it: Non-toxic formula with a light citrus scent; a good everyday option for doors, baseboards, and window frames.
Our Rating: ⭐️⭐️⭐️⭐️ 4/5
Cost: ~$19
Ease of use: ⭐️⭐️⭐️⭐️ 4/5
Pros: Botanical-based; kid- and pet-friendly when used as directed
Cons: Scent may be strong; reapply as needed
Most Effective for: Doorways, window frames, baseboards
Outdoor Ant Products
Ortho Home Defense Insect Killer (Perimeter Treatment)
What it is and how it works: Long-lasting perimeter spray for foundations, patios, and entry points. Can be used indoors, but we recommend outdoor use since it is not chemical-free.
Why we love it: Creates a broad protective barrier around high-risk areas; covers large footage quickly.
Our Rating: ⭐️⭐️⭐️⭐️ 4.4/5
Cost: ~$26
Ease of use: ⭐️⭐️⭐️⭐️ 4/5
Pros: Long-lasting barrier; great coverage
Cons: Chemical-based; follow label and keep pets/kids away until dry
Most Effective for: Perimeters, patios, door thresholds, garage entries
TERRO Outdoor Ant Killer Spray
What it is and how it works: Fast-acting spray for nests and trails outside; designed to knock down active infestations around hardscapes and landscaping.
Why we love it: Pinpoint application for patios, driveways, and fence lines where ants travel before entering the home.
Our Rating: ⭐️⭐️⭐️⭐️ 4/5
Cost: ~$24
Ease of use: ⭐️⭐️⭐️⭐️ 4/5
Pros: Quick knockdown; targeted outdoor control
Cons: Outdoor use only; reapply as needed
Most Effective for: Patios, driveways, fence lines, nest entrances
TERRO Outdoor Liquid Ant Bait Stakes
What it is and how it works: Pre-filled liquid bait stakes placed along foundations and gardens to intercept foragers and eliminate the colony before entry.
Why we love it: Easy to install and monitor; ideal perimeter solution for recurring seasonal trails.
Our Rating: ⭐️⭐️⭐️⭐️⭐️ 5/5
Cost: ~$13
Ease of use: ⭐️⭐️⭐️⭐️⭐️ 5/5
Pros: Pre-filled stakes; simple perimeter placement
Cons: Replace during heavy activity; check frequently
Most Effective for: Foundations, garden borders, near entry points
When to Get Professional Help
Call a licensed professional if you see persistent trails that return after treatment, ants emerging from wall voids or under foundation slabs, or signs of carpenter ants damaging wood. Colonies often live deep in soil or structures where DIY products can’t reach. A pro can identify species, place professional baits, and establish a perimeter barrier for lasting relief. Schedule a free inspection to get a tailored ant control plan for your Southern California home.
Frequently Asked Questions About Ant Control in Southern California
- Why do ants keep coming back after I spray them?
Sprays only kill the ants you see. Colonies survive underground and follow pheromone trails back to food and water. Use bait to reach the colony or hire a professional for colony elimination. - Where do ants usually nest around homes in Southern California?
Common sites include soil under foundations, patios, mulch beds, and wall voids where it’s cool and shaded. - What’s the best DIY way to get rid of ants?
Use liquid baits on trails, seal entry points, and keep surfaces clean. For natural options, peppermint sprays and borax sugar baits can help with light activity. - Are natural ant sprays safe for pets and kids?
Most plant-based sprays are considered family-friendly when used as directed. Always follow the label and keep products out of reach. - How do I stop ants permanently?
Combine baiting (to eliminate colonies) with perimeter protection outdoors, plus sanitation and sealing entry points. Schedule professional maintenance if activity is recurring.
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