A Year-Round Pest Control Calendar for Alvin and South Houston Homeowners

One of the most common things new customers tell us is that they didn't realize pest control needed to be year-round in South Houston. They assumed the summer was the busy season and everything slowed down in fall and winter. In most of the country that assumption would be correct. On the Gulf Coast, it isn't.

This calendar gives you a realistic picture of what pest pressure looks like across the twelve months in Alvin, Pearland, Manvel, and the surrounding Brazoria County area, and what actions — professional and at-home — are most useful at each stage.

January and February: Termite Prep and Winter Rodent Activity

Winter in South Houston is mild enough that most pests remain active at some level, but the species mix shifts. Cockroaches move deeper into wall voids and warm interior spaces. Rodents that established entry points in the fall continue to be active inside structures, particularly in attics and garages where they've found consistent shelter and food access.

The most important action in January and February is termite preparation. Eastern subterranean termites begin swarming as early as late February when temperatures warm and humidity rises, which means a termite inspection conducted now — before swarm season — gives you time to identify and treat any activity before it becomes visible indoors. Schedule a termite inspection in this window rather than waiting for swarmers to tell you there's a problem.

If you've had rodent activity, this is the time to confirm that entry points identified in the fall have been properly sealed. Cold snaps, when they do arrive, push rodents toward structures more aggressively as they seek warmth.

March and April: Termite Swarm Season and Ant Activity Surge

March and April are the highest-risk months for termite swarm activity in Brazoria County. Eastern subterranean termites swarm when soil temperatures reach the upper 60s and conditions are humid — which describes most South Houston spring days. Finding winged swarmers inside the home during this period is a clear indicator of an established colony.

Fire ants become highly active as soil temperatures rise. After winter rains, colonies that have been moving deeper underground emerge aggressively, and mound counts in yards typically peak in spring. Broadcast bait treatment during peak foraging conditions in April is one of the most effective interventions of the year for fire ant management.

General ant pressure also spikes in spring, with odorous house ants and carpenter ants seeking moisture and food sources as they rebuild after winter. Exterior perimeter treatment in this window helps establish the barrier before summer populations peak.

May and June: Mosquito and Wasp Season Begins

Mosquito populations build rapidly from May onward as rain events become more frequent and temperatures stay consistently warm. By mid-May, mosquito activity in most of Brazoria County is already significant enough to affect outdoor living. Source reduction — eliminating standing water in the yard — is the most impactful homeowner step in this window. Professional mosquito treatment targeting resting sites on the property makes outdoor spaces meaningfully more comfortable through the summer months.

Wasps and mud daubers begin establishing nests in May, with activity peaking through June and July. Paper wasps commonly build under eaves, in attic vents, and under deck planking. Mud daubers, which are non-aggressive solitary wasps, build clay tube nests on walls, under overhangs, and in garages. Web and wasp nest sweeping is included at every Green Country visit, which prevents nests from reaching the size where they become a stinging hazard.

Formosan subterranean termites swarm in May and June, typically in the evening near light sources. Homeowners who find large numbers of swarming insects around outdoor lights or porch areas in this window should examine the area carefully and schedule an inspection if mud tubes or wing deposits are found.

July and August: Peak Summer Pressure

July and August represent the highest overall pest pressure of the year in South Houston. Heat drives cockroaches indoors more aggressively as they seek moisture. Mosquito populations are at their highest. German cockroach infestations that began in spring have had time to establish and are producing second and third generations. Flea populations in yards and on pets peak with the heat.

Post-storm pest surges are particularly common in late summer. Tropical systems and heavy rain events flood ant colonies, pushing them toward structures, and displace rodents from their normal environments. The weeks following a significant storm event typically bring a spike in pest-related calls. If you're on a service plan and experience a significant storm, a between-visit call for additional treatment is exactly what the Pest-Free Guarantee is designed for.

Flea and tick treatment — interior and exterior — is most impactful in this window when populations are at their peak. Combining professional exterior treatment with veterinarian-prescribed on-animal prevention breaks the full life cycle.

September and October: Rodent Season Begins

As temperatures begin to drop in September and October, roof rats become increasingly active as they search for overwintering sites inside structures. This is the time of year when homeowners are most likely to start hearing activity in attics. Trees are dropping fruit and nuts, which attracts rodents to yards and adjacent structures. If large trees overhang the roofline, now is the time to inspect for gaps and entry points before populations establish inside.

General pest pressure begins to moderate slightly in October as nighttime temperatures drop, but cockroaches, spiders, and ants remain active and move toward interior warmth as outdoor temperatures become less consistent.

The rodent control program at Green Country includes station checks at each visit and monitoring for entry point activity. If rodent pressure begins in fall, early intervention is substantially easier and less expensive than managing an established winter colony.

November and December: Sustained Cockroach and Rodent Activity

November and December in South Houston are rarely cold enough to significantly reduce pest activity. Cockroach populations remain active indoors, particularly in kitchens and bathrooms where warmth and moisture are consistent. American cockroaches continue moving through sewer systems and foundation gaps. German cockroach populations established over the summer persist and reproduce at a reduced but still meaningful rate.

Rodents that gained entry in fall are now established and producing offspring indoors. The holiday season also brings an increase in cardboard boxes, decorations from storage, and clutter that provides additional harborage for cockroaches and rodents.

Holiday gatherings and increased kitchen activity in November and December raise the stakes for pest control. Guests noticing a cockroach or rodent droppings in a home is among the most common reasons we receive urgent calls during this period. A scheduled service visit in November — before the holiday season fully arrives — is the most reliable way to address any developing issues before they become visible.

Maintaining Year-Round Coverage

The consistent theme across all twelve months is that pest pressure in South Houston never fully stops. A quarterly service schedule maintains the perimeter barrier continuously through seasonal transitions rather than reacting after each population surge. Every Green Country recurring visit includes exterior perimeter treatment, web and wasp nest sweeping, foundation treatment, yard granulation or spray, and rodent station checks where applicable. Interior treatment is available at each visit on request.

Green Country Pest Control serves homeowners throughout Alvin, Pearland, Friendswood, League City, Dickinson, Manvel, Sugar Land, and the full Houston metro service area. Request a free estimate or call us at 281-888-8605 to set up a plan that covers your home through every season. Existing customers can manage their account and view service history through the customer portal.