You pulled a tick off your dog in April and figured it was a fluke. Or your kid came in from the backyard in late September with one on her neck. Neither of those is a fluke — that’s just tick season in Michigan doing what it does, which is running longer and showing up earlier than most people expect. Lyme disease cases in this state have jumped 168% since 2020. The ticks are here, they’re active across all 83 Michigan counties, and Genesee County is squarely in the expanding risk zone. Here’s what you actually need to know.
When Does Tick Season Start in Michigan?
The short answer: earlier than you think. Ticks don’t wait for summer. In Michigan, tick activity begins when temperatures climb above 35 to 40 degrees Fahrenheit — which, in a mild winter or early spring, can happen in mid-March. By the time most homeowners are thinking about yard prep in May, ticks have already been active for weeks.
There are two species that account for the vast majority of tick encounters in Michigan. The American dog tick is the most commonly found tick in the state and is active from early May through November. The blacklegged tick — also called the deer tick, and the primary carrier of Lyme disease — has two distinct active windows: early spring and again in the fall. That fall window catches a lot of people off guard, because they’ve mentally checked out of tick season by August.
Michigan Tick Activity by Month: What’s Actually Happening in Your Yard
Understanding tick season as a calendar — not just a vague “summer thing” — changes how you approach protection. Here’s how it actually breaks down in mid-Michigan.
March and April are when adult blacklegged ticks emerge first. These are the overwintered adults that survived the cold and become active on the first warm days. They’re looking to feed before they reproduce, and they’re small enough that most people don’t notice them. If you’ve had a stretch of 40-degree days in late March, ticks were already moving in your yard.
May through July is the most dangerous window for Lyme disease transmission, and the reason is nymphs. Nymphal blacklegged ticks are the teenage stage of the deer tick — roughly the size of a poppy seed — and they’re responsible for the majority of Lyme disease cases in humans. They’re nearly impossible to spot, they don’t cause any pain when they bite, and they’re most active during the exact months when kids and pets are spending the most time outside. American dog ticks are also fully active during this stretch, which is when most people start noticing ticks on their dogs.
August tends to be a lower-activity month for blacklegged ticks specifically, as the nymphs have molted and adult ticks haven’t fully re-emerged. American dog ticks, however, remain active. Don’t let the relative quiet of August make you complacent.
September and October bring adult blacklegged ticks back out for their fall feeding window. This is the second peak of the year, and it’s the one that surprises people most. Deer are moving more actively through neighborhoods during this period, and they’re dragging ticks with them. If your yard backs up to any wooded area, a drainage ditch, or open field along the Grand Blanc Road corridor, this is when you feel it most.
November is when activity finally begins to slow, but it doesn’t stop entirely. Blacklegged ticks can remain active on warmer fall days well into the month. The season doesn’t end with a hard cutoff — it fades gradually as temperatures drop and stay down.
Why Genesee and Shiawassee County Residents Face Higher Tick Pressure Than They Realize
There’s a common assumption that tick risk is a northern Michigan problem — something you deal with when you go up north to the cabin. That assumption is outdated, and for residents of Genesee and Shiawassee counties, it’s genuinely risky to hold onto it.
Blacklegged ticks are now confirmed in all 83 Michigan counties. Southeast Michigan’s tick risk has been expanding eastward, and CBS Detroit reported a Lyme disease case contracted locally in Washtenaw County — east of where the traditional risk zone used to end. Genesee County sits directly in this expanding zone.
The landscape of mid-Michigan amplifies that risk in specific ways. The Grand Blanc and Swartz Creek corridor runs through a transition zone between suburban development and agricultural or wooded land — exactly the kind of edge habitat where ticks concentrate. Deer move freely through residential neighborhoods here, and every deer that crosses your yard potentially drops ticks. The Flint River watershed and its tributary corridors create moist, wooded riparian habitat throughout the county, which is prime tick territory year-round.
Shiawassee County’s character is even more rural. Larger lots, working farms, fencerows, and woodlots mean tick density is higher on rural properties there. If you have acreage in Shiawassee County, you’re dealing with a different scale of exposure than a typical suburban yard.
The Genesee County Parks system — Stepping Stone Falls, Mott Lake, Holloway Reservoir — draws families outdoors regularly, and those are real tick exposure points. What people don’t always connect is that ticks hitchhike home on clothing and pets after those outings and then establish themselves in your yard over time.
Tick Bites on Dogs: What Michigan Pet Owners Need to Know
For a lot of families in this area, finding a tick on the dog is what finally makes the problem feel real. Dogs are outside more, lower to the ground, and moving through exactly the kind of brush and tall grass where ticks wait. They’re also harder to check thoroughly than a person, especially if they have thick or dark coats.
The American dog tick — the most commonly submitted tick in Michigan — is named for a reason. It feeds readily on dogs and can transmit Rocky Mountain spotted fever, though Lyme disease transmission from this species is rare. The blacklegged tick, on the other hand, does transmit Lyme to dogs, and canine Lyme disease is a legitimate concern in Genesee and Shiawassee counties. Symptoms in dogs can include lameness, joint swelling, fever, and lethargy, and they often don’t appear until weeks after the bite.
How to Check Your Dog for Ticks After Time Outside in Mid-Michigan
Tick checks on dogs should be part of the routine any time they’ve been outside during tick season — which, in Michigan, means most of the year. The areas ticks prefer on dogs are predictable: around the ears, between the toes, under the collar, in the groin area, around the tail, and under the front legs where the skin is thin and warm.
Run your fingers slowly through the coat and feel for small bumps. A feeding tick will feel like a small, firm nodule attached to the skin. If you find one, use fine-tipped tweezers to grasp it as close to the skin as possible and pull upward with steady, even pressure. Don’t twist, don’t use petroleum jelly, and don’t try to burn it off — those methods increase the risk of the tick regurgitating into the bite site, which is exactly what you don’t want.
The 48-hour window matters. Lyme disease transmission from a blacklegged tick typically requires the tick to be attached for 36 to 48 hours. Prompt removal significantly reduces transmission risk, which is why daily tick checks are worth the habit — not just after obvious outdoor exposure, but routinely throughout the season.
If your dog is spending a lot of time in a yard with documented tick pressure, talk to your vet about the Lyme disease vaccine for dogs. It’s available and it’s worth knowing about. But the vaccine doesn’t replace yard treatment — it protects the individual animal, not the source of the problem.
One thing worth understanding: a topical flea and tick product or collar protects your dog from ticks that get on them, but it does nothing to reduce the tick population in your yard. Those are two separate layers of protection, and most pet owners are only doing one of them.
Lyme Disease in Michigan: Why the Risk Is Growing
The numbers from the Michigan Department of Health and Human Services are hard to ignore. Lyme disease cases in Michigan increased 168% between 2020 and 2024. Anaplasmosis, another tick-borne illness transmitted by the blacklegged tick, increased 382% over the same period. These aren’t small fluctuations. This is a sustained, significant trend.
Part of what’s driving it is geography. Blacklegged ticks are expanding their range across the state, and warmer winters are extending tick season on both ends of the calendar. Ticks that would have died in a hard freeze are surviving and reproducing. The population is growing, the range is expanding, and more people are getting bitten.
Tick Repellent for Your Yard: Professional Treatment vs. DIY
This is the question most homeowners get to eventually, usually after the store-bought spray from the hardware store doesn’t hold up. Consumer-grade tick repellent products are available, and some of them work reasonably well for a short window. The problem is that they’re formulated at lower concentrations, they break down faster, and they’re typically applied without any real knowledge of where ticks are actually living in your yard.
Ticks don’t distribute themselves evenly across your lawn. They concentrate in specific harborage zones — the leaf litter along the fence line, the brush pile in the corner, the tall grass where your lawn meets the tree line, the shaded area under the deck. Professional treatment targets those zones specifically, using products with longer residual effectiveness and application timing that aligns with peak activity windows.
We’ve been serving Genesee and Shiawassee counties for 20 years. Our lead technician has 26 years of hands-on pest control experience, and the same person comes to your property every visit — so over time, they genuinely learn where your tick pressure is highest. That’s not something a one-size-fits-all spray program delivers.
One thing that surprises a lot of our customers: flea and tick treatment is included in our mosquito program at no extra charge. If you’re already thinking about mosquito control for your yard this season, you’re already getting tick protection built in. You don’t have to choose between them or pay separately for both.
We use IPM-certified, eco-friendly methods — which matters if you have kids or pets who use the yard. We’ll tell you exactly when it’s safe to go back outside after treatment. There are no binding contracts, no rotating strangers showing up at your door, and if you’ve gotten a quote from another licensed local provider, we’ll match a reasonable rate.
Lyme disease cases in this region have more than doubled in four years. The tick population in mid-Michigan is not getting smaller. Professional yard treatment isn’t a luxury at this point — it’s a reasonable response to a real and growing problem.
Protecting Your Yard Through Every Phase of Michigan Tick Season
Tick season in Michigan is longer, earlier, and riskier than it was even five years ago. It starts in March, peaks twice — once in late spring and again in fall — and doesn’t fully wind down until the cold holds. If you live in Genesee or Shiawassee County, you’re in an area where deer pressure, wooded lot lines, and agricultural land all converge to create real, year-round tick exposure.
The good news is that professional yard treatment works, and it works best when it’s timed to the actual activity calendar — not just sprayed once in June and forgotten. Consistent, targeted treatment through the season is what keeps tick populations down and your yard usable.
If you’re ready to get ahead of it this year, reach out to us. We’ve been serving this community for 20 years, and we’re ready to put that experience to work for your property.
