Buy the 2015 Old Farmer's Almanac!
Reporting
I also use vinegar I also use vinegar. It works as soon as the sun hits it. It also works on slugs too. You can by a gallon jug of vinegar for a fraction of the price of herbacides and it is completely safe.

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