Hi- It depends on what you want to grow. It is probably too late to start growing tomato, pepper, and eggplant for transplanting next month, but you could start broccoli, swiss chard, kale, collards, and cabbage inside now, and you can plant lettuce, peas, greens, spinach, carrots, beets, onion sets and turnips outside right now. You did not flood in Des Plaines? I was going to plant some sugar snap peas a week ago in Evanston, and I am almost glad I did not, because the seeds would have floated back up with all the rain we had last Thursday. If I would have planted them a few weeks ago, they would have survived better.
I get most of my plants at Anton's, which is on Pitner in Evanston, and I love them. They are off of Dempster, between Dodge and McCormick. They have a lot of heirloom tomato plants, and their prices are much cheaper than places like Home Depot, and they have good quality stuff. Hope this helps, Nancy