Frozen vegetables are usually frozen within hours of being picked, thus have a lot of nutritional value. Once vegetables are picked, they start to lose nutritional value quickly. Most "fresh" produce in stores has been picked at a minimum a week before, usually more.
So I love the fresh vegetables that I grow myself and that I buy from our local CSA. At the grocery, I tend to buy frozen. Except that on Sundays I generally make a big pot of vegetable soup to last all week for lunches and I buy a turnip every week to go in that. This year I'm going to try growing my own turnips.
I also buy carrots and celery every week at the grocery. With meals, I tend to buy frozen green beans, frozen peas, frozen broccoli, etc. I do buy canned tomatoes for soup. But if I can get a good deal on tomatoes this year, I'll can my own.
Serena