Leon County's Pest Pressure, Month by Month

No Reset Means Reading This Calendar Differently

Most pest calendars get written for places where a hard freeze knocks the outdoor population down and spring starts from close to zero. That story just doesn't apply here. A cold snap in Leon County slows insects down and pushes them toward the warm side of your foundation, then a single mild week starts them right back up.

So timing works differently here. Elsewhere, you treat in spring to get ahead of a fresh population. Here, you treat on a rhythm because the population never actually left, and what shifts month to month is which species is pressing at the wall and what it's doing there.

Red Hills clay handles the rest. Surface sand sheds water fast while the layer underneath stays damp, so the habitat under mulch, along a slab edge and inside a crawl space stays livable most of the year. That's exactly why the table further down shows activity in every single row.

That calendar holds outside Tallahassee too, just on a different clock. Push north on US 27 toward Havana and the shade-tobacco country around the H&G Shade Tobacco barns keeps its own soil moist under old-growth canopy well past what the coast sees, while Quincy Creek and the ground near Lake Talquin State Forest stay saturated enough that the pros we connect you with treat a slow month there as the exception, not the rule.

February Through April: Swarmers, Ants, and the First Mosquitoes

Termite swarming starts up in late winter. Swarms happen during daylight, typically on a warm afternoon after rain, which is why people find the wings rather than the insects themselves. A small pile of clear wings on a windowsill, a door threshold, or caught in a spider web near a light is about the most valuable thing you could spot on your own house.

Odorous house ants and other small ants start running trails the moment the ground warms up, following the same routes water travels along. Fire ants become obvious during this stretch too, since mound building resumes and mounds start popping up in lawns, along fence lines and around irrigation heads.

This is also the right window for the annual termite inspection Florida recommends, plus the outdoor work that pays for itself: pull mulch back off the siding, get exterior woodwork clear of the soil, trim back anything touching the roof, and clear the crawl space hatch so someone can actually get in there.

Tallahassee's swarm and ant activity in this window doesn't stop at the city line, and the licensed pros we connect you with field the same February-through-April calls out toward Bradfordville, where homes along Meridian Road canopy road and near Bannerman Crossing sit closer to Lake Iamonia and the Bradfordville branch creeks than to any municipal storm system. Closer in, Midtown lots near Lake Ella and Lafayette Park carry older plumbing and shadier yards, which holds ground moisture long enough to draw the same swarmers and early mosquitoes the calendar predicts.

May Through July: Mosquitoes, Wasps, Fire Ants, and a Closed Bat Window

Mosquito pressure builds through this whole stretch and then just stays. The productive breeding ground isn't some pond -- it's a saucer under a flower pot, a fold in a tarp, a corrugated downspout extension, a clogged gutter, a toy holding water in the shade. Anything holding water for about a week counts as a source, and emptying it out beats spraying it every time.

Wasp and hornet nests grow large enough to notice around now. Yellow jackets nesting in a ground void or wall void are the ones to take seriously, since they're defensive and the entry hole is often nowhere near the actual nest. Carpenter bees are drilling into fascia, deck rails and porch ceilings, and the woodpecker damage that follows usually costs more than the bees themselves do.

Fire ants run at full pace now, rebuilding a mound within days of heavy rain. Treat the mound and the surrounding ground rather than just the top of it, since a disturbed colony will just move a short distance and rebuild rather than dying off. And note the bat dates: eviction and exclusion are prohibited statewide from 16 April through 14 August, putting this entire month inside the closed season.

July and August: Roach Season and the Wet Slab Edge

The big outdoor roaches drive most calls during high summer. American and smokybrown cockroaches live in mulch, leaf litter, gutters, storm drains and the damp seam under a bin pad, coming indoors once the ground saturates. A thunderstorm Thursday evening and a roach in the kitchen Friday morning isn't a coincidence -- and it isn't a sanitation failure either.

On a slab home, this is the season entry points reveal themselves. Water pushes activity toward the bath trap, the plumbing penetrations, the construction joint, and the gap where the slab has shrunk back off the foundation wall. Termites use those same openings, needing only about 1/32 inch of clearance to get through.

Mosquitoes peak in the two hours surrounding dawn and dusk. If the yard's become unusable, this is when a yard treatment is worth the money, and it performs better when standing water gets eliminated at the same time.

September Through November: Swarms Continue, Attics Get Busy

Termite swarming keeps going into September or October here, which surprises anyone who's read that swarming is strictly a spring event. A daylight swarm in early fall is completely normal in this market, so wings on a sill in October mean exactly what they meant back in March.

As nights cool down, rodents and squirrels start hunting for a warm void, and they find the same three entry points every single year: the gable vent, the roof-to-soffit junction where the framing steps, and the plumbing or wiring penetration behind the kitchen. Squirrels chew their way in. Mice don't even need to -- a gap the width of a pencil is all it takes.

This is the best window for exclusion work, since you're sealing before animals commit rather than after there's already a nest inside. It's also the right time for a crawl space moisture reading -- a space that's been wet all summer will read high now, and that number belongs on a report before it turns into a repair estimate.

December and January: Quiet Outside, Busy Inside

The yard goes quiet, but the house doesn't. Mice and rats are established in the attic, garage and crawl space by now, and the evidence shows up as droppings along a joist, a chewed corner on a stored box, and noise overhead at dusk. Squirrels make their racket in the morning instead.

Warm spells matter more here than the cold ever does. A run of mild days in January will bring ants right back to a kitchen and can trigger an early termite swarm, since late winter marks the start of the swarm window rather than the end of a quiet stretch.

This is a good stretch for the work nobody wants to tackle in July: crawl space ground cover, vent decisions, sealing attic penetrations, sorting out the mulch and firewood situation before spring arrives. None of it feels urgent in January, which is exactly why it gets done right.

The Whole Year at a Glance

Use this as a planning reference. The right-hand column shows the cheapest, most effective work for that window -- usually not the same thing you'd feel like doing at that time.

Two Dates Worth Circling

The first is 16 April through 14 August. Bat eviction and exclusion are prohibited statewide for that entire window, since the pups can't fly yet and sealing a roost would trap them inside. Bats are protected in Florida, and the wildlife side of this work carries no state license at all, so the questions that matter are about method and timing rather than a certificate number. During the closed months, the correct work is inspection, planning and protecting the living space, with exclusion carried out starting 15 August.

The second is whichever month you pick for the annual termite inspection -- the only wrong answer is picking no month at all. Florida's prevention list is short, dull, and it works: exterior woodwork a minimum of 6 inches above soil, crawl space beams at least 18 inches above the ground so the space stays inspectable down the road, zero wood-to-soil contact, grading that carries water away from the structure, and an inspection every year without fail.

Pick a month you'll actually remember, book it, and the rest of this calendar mostly takes care of itself.