A month-by-month wasp calendar for Tulsa
April and early May is when a fertilized queen comes out of hiding and starts a nest by herself. She builds a few cells, lays, and hunts. This is the only stretch of the year when one person with a garden hose can end a colony in ten seconds, and almost nobody looks. June and July are the growth months. Workers take over the building and the queen does nothing but lay eggs. The nest doubles and doubles again, but the wasps are still busy hunting soft-bodied insects and are not much interested in you. August through October is peak. The colony is at maximum size, the diet flips to sugar, and the wasps you meet are defensive and persistent. Almost every sting in Tulsa happens in this window. November onward the first hard frosts arrive, workers die, and only next year's mated queens survive under bark or in leaf litter. The nest is finished for good. Nothing reuses it, and if you can reach it safely, that is the ideal time to take it down and seal whatever gap let them in.
Which nests actually need treating, and which do not
Start with location rather than size, because a big nest in the wrong place is a photograph and a small one in the wrong place is an emergency room visit. Treat anything within a step or two of a door, gate, walkway, deck, or play area. A mature colony defends a zone around its entrance, and ordinary noise, a slamming screen door or a lawn mower, reads as an attack. Treat every ground nest in a used part of the yard, because you cannot see it coming and mowing is how most people find them. Treat any colony working a wall void, since those grow unseen and can break through interior surfaces. You can reasonably leave alone a hornet nest high in a back-corner tree, a paper wasp comb on an outbuilding nobody enters, and anything past the point where you would need to climb. With a Tulsa winter ending the colony anyway, patience is a real option for those, as long as nobody in the house has a sting allergy.
What a first visit should look like
A good wasp visit starts with fifteen minutes of watching rather than spraying. The applicator wants the flight line: where wasps enter, where they leave, and whether the traffic converges on one point or several. That is the whole job on a hidden nest, because a dust applied two feet from the real entrance does nothing. Expect a walk of the full perimeter, not just the corner you pointed at. Soffit returns, brick weep holes, gable vents, deck framing, meter boxes, and the base of the foundation all get a look. Old rodent burrows against the house are a common find. The application itself is quick and usually happens at dusk or after dark, when the colony is home and slow. You should be told to stay inside, to keep pets in, and to expect angry traffic at the entrance for a day or two while returning foragers pick up product. Ask before anyone leaves whether the dead nest gets removed, when, and whether that return trip is already in the price.
Renters, landlords, and a nest in the wall
A colony inside a wall or soffit is a structural problem, which in most rental arrangements puts it on the owner rather than the tenant. A paper wasp comb on a balcony rail that appeared last week is closer to routine upkeep. The dividing line people argue about is whether the wasps got in through a gap in the building, and with a wall-void nest they did. Put the report in writing the day you notice it, with a photo of the entrance point and a note of the date and the traffic you can see. That record matters if the nest goes untreated into September and somebody gets stung. For a landlord, the cheap version of this is a spring walk of every unit's eaves in late April, when combs are the size of a coin. For a tenant, the useful move is to stop using that side of the building and to keep windows on that wall closed, since wasps working a void frequently end up inside the apartment. Either way, do not let the argument run until October.
How to compare two quotes without guessing
Price differences on wasp work usually come down to four things, and once you know them the higher bid often turns out to be the cheaper one. First, does the quote cover finding the nest or only treating a nest you have already located? On hidden colonies, the search is the labor. Second, does it include removing the nest after the colony dies, or only killing it? An enclosed hornet envelope left in place stains siding and comes down in pieces. Third, is a return visit included if traffic continues after a week? Dust works through the colony over several days, and a small share of jobs need a second application. Fourth, does anyone seal the opening afterward, and is that carpentry included or a separate charge? Ask each company the same four questions and write the answers side by side. Also ask what time of day they treat. Anybody planning to spray a ground nest at two in the afternoon has told you something useful about how they work.