
If you’ve ever found a tick latched onto your dog after a hike, or watched your pup scratch themselves raw from flea bites, you already know: prevention is way cheaper than treatment. But when should you start? And which products actually deliver the best bang for your buck?
This guide breaks down flea and tick season by region, compares the top preventatives side by side, and highlights budget-friendly options — including some natural alternatives that genuinely work.

Flea and Tick Season by Region
Flea and tick activity depends heavily on climate. Warmer, humid areas see longer seasons — sometimes year-round. Here’s when to start prevention based on where you live:
Southeast (Florida, Georgia, Alabama, the Carolinas, Louisiana, Texas)
- Season: Essentially year-round
- Start prevention: January — don’t stop
- Fleas thrive in humidity above 50%, and the Southeast rarely drops below that. Ticks are active in every month except maybe a cold snap in January.
Southwest (Arizona, New Mexico, Nevada, Southern California)
- Season: March through November
- Start prevention: Late February
- Dry heat suppresses fleas, but ticks (especially brown dog ticks) are surprisingly resilient. Desert monsoon season creates perfect breeding conditions.
Midwest (Ohio, Indiana, Illinois, Michigan, Wisconsin, Minnesota, Iowa, Missouri)
- Season: April through October
- Start prevention: Mid-March
- Ticks wake up as soon as temps hit 40°F consistently — often before the last frost. Start before you think you need to.
Northeast (Maine, Vermont, New Hampshire, Massachusetts, New York, Pennsylvania, New Jersey, Connecticut)
- Season: April through October, with deer ticks emerging in March
- Start prevention: Early March
- Lyme disease country. Deer ticks (black-legged ticks) become active at 40°F. Don’t wait for “warm weather.”
Pacific Northwest (Washington, Oregon, Northern California)
- Season: March through November
- Start prevention: Late February
- Mild, damp conditions are flea paradise. Ticks are common in wooded and coastal areas.
Mountain West (Colorado, Utah, Montana, Wyoming, Idaho)
- Season: May through September
- Start prevention: Late April
- Shorter season, but tick-borne diseases like Rocky Mountain spotted fever are real risks at elevation.
General rule: Start prevention 30 days before your region’s typical season begins. It takes time for most products to reach full effectiveness.

Monthly Preventatives Compared
Here’s how the top flea and tick products stack up, with current 2026 pricing for a medium dog (21-55 lbs) based on a 6-month supply:
| Product | Type | Duration | Kills Fleas | Kills Ticks | 6-Mo Price |
|---|---|---|---|---|---|
| NexGard | Chewable | 30 days | Yes | Yes (4 species) | -150 |
| Simparica | Chewable | 30 days | Yes | Yes (5 species) | -140 |
| Bravecto | Chewable | 90 days | Yes | Yes (4 species) | -135 |
| Seresto Collar | Collar | 8 months | Yes (repels) | Yes (repels) |
