The answer to 'when to treat for ticks' is that you should treat for ticks in the spring and fall when tick activity is highest. Ticks are most active in the warmer months when temperatures are between 40-90°F. In the spring, ticks emerge from their winter dormancy and start seeking hosts to feed on. In the fall, ticks are active as they try to prepare for the winter by feeding and reproducing.
It's important to treat for ticks proactively, before you or your pets encounter them. Applying tick control products like sprays, powders, or collars in the early spring and again in the fall can help prevent tick infestations and reduce the risk of tick-borne diseases like Lyme disease. Be sure to follow the product instructions carefully and treat all areas of your yard where ticks may be present.