If you are thinking about growing your own fresh veggies this year, and you are in zone 5/6, it's time to plant the cold season crops-- broccoli, cabbage, kohlrabi, lettuce, kale-- so you have an early crop of veggies coming. Till the soil until it is loose and friable, plant with a little starter fertilizer, grab the wok and stand by. (My DH always accuses me of doing that.)
You can also seed down lettuces, radishes, carrots, beets-- short of having a share in a CSA or a direct line to a local farmer's market, it doesn't get much fresher than that.
Tomatoes, peppers, eggplant and such (the "warm season" crops) will need to wait until all danger of frost is past.
Do yourself and your family's health a favor this year and grow your own, even if you only have a couple of big pots on a patio or deck to grow in.