Planting is a little bit like gambling. The only thing you can really do is put the odds in your favor as much as possible and roll the dice. I look for certain variables to line up more than a date on the calendar. However, in most given years that happens in mid to late Sept. I want good soil moisture already present in my plots with rain coming on a season changing front. I want to see 90+ degree temps disappear before planting. Things are happening a little early this year. I'm not panicking to get them in or anything though. Last year taught me that you've got a LOOOONG window for planting.