To Spring or Not to Spring

It looks like Spring.
It smells like Spring.
Officially, it is spring.

But is the weather going to co operate? That is the question.
See, it is taunting me right now. Because it knows that I have some earth around me that I am considering cultivating. But I can't do that if the weather is too cold. Celtic Rose and her husband have already lost a few plants, and my poor neglected trees have not even sprouted yet. If I plant something here, I want it to live. Not freeze.
When I got up to take MG to school today, the thermometer read 36 degrees. Brrrrr! And rumor has it is going to rain today. I don't have a problem with that, I love the rain. And it would probably be good for anything I planted.
But those are my thoughts today.
What should I plant, and when?