That's a helpful reminder, Chris--I forgot about the tree-protection, which I have a certain amount of, notably under a big evergreen. It works in the fall, too--I now remember that my impatiens (grown from seed under lights) lasted and looked better longer into the fall than in some that I had set out in front of my house (shaded but no tree protection.)
I remember during my first Spring here in April when I saw all the pretty annuals that had arrived at our local Agway plant store. I wanted so badly to buy some to plant out, but the helpful salesperson confided that if I did so, I'd just be back in a few weeks to re-buy everything! She said they only put them out from the growers because people insisted on it, and that it was a pain to keep protecting them at night!
It's just so hard to wait!