How to Prevent Wasps from Nesting

Wasp-Proofing Your Home and Property

Seal any openings you find in your home’s exterior. Go around the outside of your home and look closely for cracks, gaps, damaged screens or vents, or any other spots that might harbor a colony of wasps. When you find a potential entry point, repair it by replacing the damaged materials or patching it with silicone caulk, wood putty, or a similar sealant. It’s important to also seal other structures and objects that wasps might attempt to make a nest in, such as tool sheds, hollow planters, and overturned flower pots.Warning: Don’t assume that any crack or crevice is too small for a wasp to infiltrate. The industrious insects can set up camp in even the tiniest spaces.

Fill holes in your lawn and garden. Certain types of wasps (yellow jackets, in particular) build their nests in the ground. Just like you did with the structure of your home, perform a thorough inspection of your yard area, keeping an eye out for small holes or tunnels. Plug these openings with dirt or sand and pack the material down tight to keep your turf off-limits to future intruders. This step will be especially important if you have dogs or other pets at home that like to dig. Never attempt to “smoke out” an underground wasp’s nest by filling it with flammable liquids. Not only is there no guarantee that this will solve the problem, it also presents an enormous fire hazard, and could have devastating consequences.

Make sure all outdoor waste containers are completely covered. Garbage cans, recycling bins, compost piles and other receptacles containing traces of food or moisture are also popular nesting sites for wasps. The best way to guarantee your waste containers aren’t subject to a wasp invasion is to double-check that their lids are clamped down securely every time you put something in them. Make it a point to replace receptacles with holes, gaps, or ill-fitting lids as soon as you notice them. If you continue to have an issue with wasps swarming around your garbage can or recycling bin, consider moving these containers to an indoor area, such as a garage or shed.

Clean up outside food and drink right away. Anytime you decide to enjoy a backyard picnic, barbecue, or dinner on the patio, take your uneaten food dirty dishes inside as soon as you’re finished. The longer you wait, the more likely traveling wasps are to pick up the scent and move in for a closer look. If you’re unlucky, Cover your dishes with lids, heavy towels, or plastic wrap before and after eating, and serve beverages in wide-mouthed, open containers to avoid unknowingly gulping down curious wasps.

Dispose of overripe fruit from fruit trees quickly. Wasps feed on nectar, and are especially fond of items like apples, pears, plums, and berries once they’re past their prime. If you have fruit trees on your property, do a daily walk-by during the growing season to look for fallen fruit that’s begun to rot. Scoop what you find into a plastic bag, then tie off the bag and place it in a sealed waste container. If you’re in the habit of composting fruit and vegetable scraps, bury them under other less attractive materials so that wasps can’t get to them.

Knock down new nests before they have time to become a threat. If you happen to spot a nest that’s still in the earliest stages of development, it will usually be safe to destroy it. Use a broom or similar long-handled tool to dislodge the nest from the structure it’s clinging to, then throw it away or step on it to break it up completely. Disrupting a new nest while the queen wasp is away will discourage her from returning and trying again. Wasp’s nests often resemble an inverted umbrella or balloon, with honeycombed egg cells constructed from a gray, papery material. It’s a good idea to put on long-sleeved clothing, closed-toes shoes, thick gloves, and a protective head cover of some sort anytime you know you’ll be venturing near a wasp’s nest.

Warding Off Wasps

Spray common nesting areas with essential oils to keep wasps away. Fill a small spray bottle with 3–5 fluid ounces (89–148 mL) of water, then add a few drops each of clove, geranium, and lemongrass oil and shake well. Spritz the mixture onto the ceiling and railings of your porch, the eaves of your roof, or any other nooks and crannies where wasps might seek entry. Reapply your oil concoction daily or as often as needed, especially in the warmer months. Peppermint, rosemary, and thyme oil can make an effective substitute if you don’t have any of other listed oils handy. In a pinch, you can also use a simple mixture of liquid dish soap, cayenne pepper, and water for quick spot treatments.

Set up wasp traps in places where you’ve spotted wasps in the past. You can buy readymade wasp traps from your local home improvement store or gardening center for just a few dollars apiece. These work by luring the wasps in with bait like sugar water or fruit juice, then making it impossible for them to climb out again. Hang your traps in areas at risk of infestation, like your deck, garage, or attic. You can also make your own wasp traps out of ordinary plastic drinking bottles. Keep in mind that wasp traps are only designed to kill off individual wasps. They won’t do away with an already-established colony, but they can dispatch scouts that are looking to start one.Tip: Add a few drops of dish soap to the bait in your traps to increase their effectiveness. The soap will reduce the surface tension of the liquid, making it even harder for the wasps to regain their footing.

Hang up a fake nest to confuse exploring wasps. Position the decoy nest somewhere outside your home where it can be plainly seen. Wasps are naturally territorial—if they think another colony has already beaten them to a good spot, they’ll usually move and look for somewhere else to build their nests. For maximum protection, situate your fake wasp’s nest close to vulnerable parts of your home’s exterior. Pick up a fake wasp’s nests at your local gardening center, or order one online. Most of these products cost less than $10.

Try growing some plants that repel wasps. Fragrant plants that give like mint, eucalyptus, and citronella that give off a pungent scent have been shown to drive away bees and wasps. Plant your chosen species around the outside of your home to warn wasps not to come closer. You can also cultivate them in containers indoors near areas where you’ve spotted wasps in the past. Other plants that wasps find distasteful include geraniums, marigolds, pennyroyal, wormwood, and basil. Another benefit of using plants to deter wasps is that they’ll add an element of beauty and a pleasant aroma to whatever area you decide to put them in.

Avoid wearing white or yellow clothing when working outside. Wasps may instinctively gravitate toward these colors, thinking that they’re flowers. As much as possible, stick to dull or neutral shades when you’re preparing to mow the lawn, clear brush, or plant some bulbs. They’ll attract far less unwanted attention. Many insects are incapable of seeing red, which makes it a good color to wear if you plan on being in your garden for long periods of time.

Limit your use of perfumes and other sweet-smelling products. The same goes for body sprays, colognes, aftershave, and potent soaps and deodorants. Wasps may mistake these scents for those of their favorite flowers, and even a small amount can carry long distances on a breezy day. Instead of your usual fragrance, try rubbing some clove, geranium, lemongrass, or peppermint oil onto your neck or wrists before heading out for a stroll in the garden. If essential oils aren't your thing, invest in an insect repellent that contains DEET. A common ingredient in commercial bug sprays, DEET is effective against many species of biting and stinging insects, including wasps