The answer to 'when to treat for ticks' is that the best time to treat for ticks is in the spring and fall when tick activity is highest. Ticks become active as temperatures rise above 40°F, typically from March to May and again from September to November. This is when they are most likely to be looking for a host, including humans and pets, to feed on.
Treating for ticks during these peak seasons can help reduce the risk of tick-borne illnesses like Lyme disease, which are more common during the warmer months. It's important to use an effective tick control product and apply it according to the instructions, as well as take other preventative measures like checking for ticks after being outdoors.