So my new lawn is doing well after a disasterous start last year, we renovated last Fall. My neighbor to the side of me in a rental house has thousands of dandelions in his yard, by far the most I've seen in one place. I want to prevent them coming over to my yard next year. Is the best bet just putting down some Pre-M next Spring? I didn't put any down this year since I overseeded. I have TTTF.