A couple weeks ago a neighbor's landscaper was fertilizing and over seeding the lawn. Guess he wanted to take advantage of a freaky sunny 60 degree day. That grass seed has long been rotted by the subsequent rain, snow, sleet and all-around crappy cold weather. A waste of time and homeowner money. Lawn seed most commonly used around here germinates best at a soil (NOT AIR) temp of 60 degrees. It takes multiple 60 degree plus days in a row to get soil to that temperature. So while it's great to get an early start on things, patience and a little knowledge once again is a virtue.  It's science yes, just not rocket science.