We usually pass out fliers every month during the growing season. We hit the same neighborhoods at 3 times, yes the same 1, and yes 3 months in a row.
Suggestion: Get a website and get it SEO(optimized)
I haven't been in the phonebook for over 2 years and we continuously grow every year ever since. All of our clients have been either word of mouth or articles I've written or our website.
Back to your question: March is a great time to start, find the neighborhoods you want to pick up accounts and re-visit them every month
04 Chevy 3500
04 F350 Diesel
3 60" Toro Zmaster/Lesco 48"
3 8'2" Boss V-Plows
20' Enclosed trailer/16' Open trailer
18' Skid Loader Trailer
S185 Bobcat 2-Speed