The short version
Around Florissant, queens start nests in April, and colonies peak in late summer. Small, low paper wasp nests can be handled at dusk. Leave wall, ground and high nests to a pro.
- Treat nests at dusk, when wasps are home.
- Never seal a hole wasps are using.
- Ground and wall nests are best left to a pro.
- Knock down small nests early in spring.
- Call 911 for breathing trouble after a sting.
Anyone in Florissant dealing with wasps, hornets or yellowjackets at home.
What to look for
Late-summer colonies are big and quick to sting. Near a door or deck, stings will happen. Wasps defend the area around their nest.
- 1Wasps flying straight lines to and from one spot.
- 2Yellowjackets streaming from the ground after mowing or trimming.
- 3Yellowjackets crowding trash cans, soda cans and pet food.
- 4Dead wasps collecting on interior windowsills in late summer.
- 5A soft or discolored patch of drywall with faint buzzing.
- 6Open umbrella-shaped comb under a porch ceiling or railing.
Why it’s worth acting soon
- Nests grow all summer.
- Ground nests get disturbed by mowing.
- Wall nests can chew through into rooms.
- Stings are dangerous for anyone allergic.
Treatment options and typical costs
Inspection and Nest Identification
$75–$200
A pro starts by confirming the species and the nest location. Paper wasps, hornets and yellowjackets each call for a different approach.
- Time
- 45–75 minutes
- Best for
- Every job; species and nest location decide the method
Preventive Spring Treatment and Follow-Up
$150–$400
Preventive work makes the most sense for Florissant homes that have had nests two years running, or where someone has a sting allergy. It is a modest cost compared with a wall-void job.
- Time
- 45–90 minutes
- Best for
- Sting allergies or repeat nest spots
Aerial Nest Treatment and Removal
$100–$400
A treated nest should go quiet within a day. A few stragglers are normal. Ask whether removal and a follow-up check are included.
- Time
- 30–90 minutes
- Best for
- Exposed paper wasp, hornet and bald-faced hornet nests
Sealing Up After the Nest Is Dead
$150–$450
Sealing gaps around Florissant homes also blocks other pests, so the work pays twice. Screened vents and tight soffits also keep out birds and bats.
- Time
- 1–2 hours
- Best for
- Sealing the gap once the nest is dead
Prices are typical published ranges. Ask what’s included before you compare quotes.
Once a nest is dead, screening and sealing gaps around pipes and vents keeps next year's queen from using the same opening.Which wasps live around Florissant.
Paper wasps are the most common around Florissant. They build open, umbrella-shaped combs under eaves and railings. Eastern yellowjackets nest in the ground and in wall voids. They cause most stings. Bald-faced hornets build big gray nests in trees and eaves. European hornets live in Missouri too. They're large, fly at night, and nest in hollow trees. Mud daubers build tube-shaped mud nests. They rarely sting.
Local wasps conditions in Florissant.
Florissant sits in a humid continental climate, and that sets the pace for wasp activity here: mid-summer through fall (July-October). In Florissant, the area is mostly suburban, so wasps pressure can differ from one block to the next depending on how tight the entry points are and how much food, water, or shelter is close by. An inspection in Florissant usually starts outside and works inward, checking the foundation, gaps around doors and windows, and any moisture or clutter near the structure first. Knowing Florissant's seasonal timing lets you schedule treatment before the busy stretch rather than after it, which usually means faster service and a more accurate quote. A provider who works Florissant and Missouri every day can point out the specific conditions that matter most here, and getting the scope, price, and follow-up terms in writing makes it easier to compare options.
Paper wasps like quiet, sheltered corners. Check garage rafters, door tracks and high shelves in spring for small starter combs.When they’re most active.
Nests die back after the first hard freeze in fall. Early spring is the easiest time to remove small starts.
Where they nest around houses here.
Plenty of homes in Florissant have basements, but most nests are higher up. Check eaves, attic vents and window frames. Watch for traffic in and out of gaps. A ground nest looks like wasps streaming from one hole. Homes from Florissant out to St. Charles and St. Louis share the same favorite nest spots.
A year of wasps in Florissant.
- Spring: queens start new nests around April. Knock down small starts. - Summer: highs near 88°F in Florissant help colonies grow fast. - Late summer: peak season. Workers hunt sweets near people. - Winter: lows near 23°F in Florissant. Nests die; only queens survive.
Wasp, hornet or bee?
- Paper wasp: slim, long legs, open comb. - Yellowjacket: bright yellow and black, nests in the ground. - Hornet: larger, with a big closed paper nest. - Mud dauber: thin waist, mud tube nests. Rarely stings. - Honey bee: fuzzy and golden. about relocation.
If you get stung.
Move away from the nest first. Wash the sting and use a cold pack. An antihistamine can ease itching and swelling. 911 for trouble breathing or a swollen face or throat. If someone carries an epinephrine pen, use it.
Keeping wasps away from the patio.
- Food: cover plates and drinks outdoors. - Trash: keep lids tight and bins away from doors. - Fruit: pick up fallen fruit. - Spring checks: knock down small nests early. - Gaps: seal gaps after a nest is gone.
Ground nests: what to do.
Mark the hole with a flag. Keep kids and pets away. Don't mow over it. Don't pour gasoline or water in. Pros treat ground nests at night, when the colony is home.
A nest, or just visitors?
Wasps on flowers or trash cans may come from far away. A nest shows steady traffic to one spot. Watch at dusk, when they fly home. Follow the line back to an eave, vent, shrub or hole.
Treating a small nest yourself, safely.
- Only if it’s small, low and out in the open. - Never if anyone in the house is allergic. - Wait until dusk, when wasps are home and slow. - Wear long sleeves, pants and gloves. - Use a jet wasp spray from several feet away. - Never spray from a ladder. - Leave it overnight, then bag the nest.
Wasps and pets.
Dogs often snap at wasps and get stung on the face. Most stings just swell a little. your vet if the throat swells or breathing changes. Keep pet food and water bowls indoors in late summer.
Kids and wasps.
Teach kids to walk away calmly. Swatting makes a sting more likely. Check play sets, slides and playhouses for nests each spring. Use cups with lids for sweet drinks outside.
After the nest is gone.
Wasps don't reuse old nests. Seal the gap a wall nest used once it's quiet. Check nearby eaves for new starts. Knock down small new nests early next spring.
Wasps at picnics and barbecues.
- Drinks: use cups with lids or straws. - Food: keep it covered until you eat. - Trash: bag scraps and close the bin. - Calm: don’t swat; slowly move away. - Kids: teach them to walk away calmly.
Ground nests in the lawn.
Yellowjackets often nest in old rodent holes. Watch for wasps flying in and out of the grass. Mark it, and keep mowers and kids away until it's treated.
Questions to ask before you sign.
- What kind of wasp is it? - How will you treat a nest inside the wall? - Is removal of the dead nest included? - Is a return visit included?
What affects the price
- Whether nest removal is included after treatment.
- Sting allergy in the home requiring extra precautions.
- Roof pitch and safe access to the nest location.
- After-hours, weekend or emergency scheduling.
- Dense siding, brick or stone that limits dust access.
- An open comb or a nest inside a wall.
📊
What's your biggest concern about wasps?
When to call for help
They'll find another way in. Don't seal a hole wasps are using. right away if anyone in the house is allergic. Call for nests in walls, attics, the ground, or anywhere high.
What you can do yourself
Big, high or hidden nests are a job for a pro. Knock it down the next day. Spray it at dusk with a wasp aerosol. A small, reachable paper wasp nest is a fair DIY job.
Wasps in Florissant
With summer highs near 88°F in Florissant, colonies grow fast and are biggest by August. Winter lows near 23°F in Florissant end the season; only new queens survive, tucked into sheltered spots. In Florissant's neighborhoods, eaves, decks, play sets and shrubs are favorite nest sites.
Local research
Wasps in Florissant, MO: what the public record shows
Before you compare quotes, it helps to know which wasps actually live in Missouri, when they are busiest around Florissant, and what the state figures look like. Everything below links to the agency or university page it came from.
Wasp species recorded in Missouri
- Bald-faced hornet (Dolichovespula maculata) — Penn State: 'found in most of the 48 contiguous states and D.C., throughout Canada and in Alaska'; actually an aerial yellowjacket that builds the football-shaped gray paper nes…
- European hornet (Vespa crabro) — Penn State: 'first detected in the 1840s', 'well established in the eastern United States', 'first reported from Arkansas in 1999'; workers 'up to an inch (25 mm) long', nests '…
- European paper wasp (Polistes dominula) — Penn State: 'first reported in 1978 around Boston', now 'coast to coast ... although they are apparently less common in the Southeast and Great Plains'; nests in 'eaves of struc…
- Native paper wasps (Polistes spp. (e.g., P. fuscatus, P. apachus, P. exclamans)) — Open umbrella-shaped nests under eaves, porch ceilings and railings. UC IPM: paper wasp colonies 'vary between 15 to 200 individuals'; Penn State: queens 'establish nests in May…
When wasps are busiest around Florissant
Queens emerge in April–May, colonies peak August–October, and workers die at the first hard frosts; only new queens overwinter (OSU, Penn State, UMN).
Bald-faced hornet range per Penn State covers most of the 48 contiguous states and D.C. European hornet is established across the eastern United States (Penn State).
Rules that apply in Missouri
For context, nationally
- 788 — Deaths from hornet, wasp, and bee stings, 2011–2021 (US). CDC MMWR
- 72 deaths per year — Average annual sting deaths, 2011–2021 (US). CDC MMWR
Sources: CDC MMWR; Baldfaced Hornet; European Hornet; European Paper Wasp; Yellowjackets and Other Social Wasps (Pest Notes). Figures are quoted as the source prints them. How we check our sources
Simple ways to keep wasps away
- Caulk around cable, gas and conduit entry points.
- Cover drinks outdoors and use lidded cups for kids.
- Repair torn window screens and door sweeps.
- Clean outdoor eating areas right after meals.
- Pick up fallen fruit under trees promptly.
A good wasp quote names the species, where the nest is, how it will be treated and whether taking it down or sealing the gap is included.Did you know?
European hornets hunt at night and are drawn to porch lights
Only newly mated queens survive the winter
Questions people ask
What should I do if I get stung?
An antihistamine helps with itching. 911 for trouble breathing or a swelling throat.
What time of day should a wasp nest be treated?
At dusk or after dark, when they're home and calm.
Will wasps come back to the same nest next year?
They don't reuse old nests. New queens often pick the same sheltered spots, though.
Can I just leave the nest alone until winter?
If it's out of the way, often yes. Around Florissant, nests die back after the first hard freeze in fall.
How do I know if I have wasps, hornets or yellowjackets?
Paper wasps build open, umbrella-shaped combs. Yellowjackets nest in the ground or walls. Hornets build big, gray, closed nests.
Is it safe to remove a wasp nest yourself?
In Florissant, a small, exposed nest can be treated at dusk with the right spray and protective clothing. Anyone allergic to stings should never try.
How often should you check your property for wasp nests?
Every week or two from spring through late summer. In Florissant, look under eaves, decks, sheds and play equipment, where small nests are easy to deal with.
When is wasp season in Florissant?
Around Florissant, queens start nests in April, and colonies peak in late summer. Nests die back after the first hard freeze in fall.
Are hornets common in Florissant?
Bald-faced hornets are, in trees and on eaves.
Nearby cities
Related guides
Sources (8)
The facts in this article come from the public sources listed above. Every home is different, so ask the company you talk to about pricing and what’s included. Published by Wasp Exterminator · Updated September 11, 2026 · How we write these guides