In my area we have three planting times a year.
Spring: Leafy green crops like lettuce, peas, broccoli, spinach, onions, leeks and that stuff that isn't sensitive to cold weather. You can plant it from March through May.
Summer: Heat loving plants like tomatoes, beans, peppers, basil, 2nd crop of chard. Usually getting them in the ground any early than mid-May is a waste of seed and time. So chilly that they rot or don't get around to popping up any earlier than if you'd planted between mid-May and Mid-June.
Late summer: Another batch of greens that will be ready in the fall. Plant late August through September and you'll probably get a good fall crop. Kale lasts forever; you might even be picking it in November and December. Plant garlic to come up and be harvested next year
So is anyone else getting ready to think of plopping in a couple of the warm weather plants? I have two of the topsy turvy planters and a tomato for one, a bell pepper for the other. It's a warm spring so they're getting planted this weekend if not before.
Other than that I'm sticking to pots. And house hunting. If we buy a place I hope to have raised beds for next spring.