Buy the 2015 Old Farmer's Almanac!
Do a "Search" on ...... "weed", or "till", or go thru the previous pages of this forum as there was a whole bunch of talk on that very topic! Good luck & Welcome to the TOFA Forums :) Here's a couple of threads to get you started:

2015 Garden Calendar2015 Weather Watcher's Calendar2015 Recipes Calendar2015 Engagement Calendar 2015 Everyday Calendar2015 Country CalendarNew Year Cross StitchLobster Rope Doormats