Its a constant dilemma as a farmer when to plant the first crops of the year. You always want to plant as early as possible because you get more grow time, yet if you plant to early then you can loose entire crops, lots of time and resources.
This is the best tried and true tip I have found over the many years I have been gardening/farming and also know many old school farmers who attest to this as well.
Plant On!
My video is at DLive