March Is National Nutrition Month & Frozen Food Month
You can thank the late Ronald Reagan for the somewhat quirky fact that March is officially Frozen Food Month. Back in 1984, the President who also decreed that ketchup is a vegetable issued a proclamation designating March 6th as Frozen Food Day in honor of his fondness for TV dinners. Since then the day has expanded to embrace the entire month, and it coincides with National Nutrition Month.
Surprisingly, that juxtaposition turns out to be a fortuitous one. Although many TV dinners don't get high marks from nutritionists, largely because of salt content, flash frozen fruits and vegetables are actually better for you than most so-called "fresh" produce. The reason is that fruits and vegetables destined for transport are picked before they're ripe and they haven't reached their full nutrient potential. Not only that, but the amount of antioxidants goes down further while the fruits and vegetables are en route and then waiting in the supermarket for you to put them in your cart.
Of course if you harvest your veggies from your own garden or pick fruits from your own trees and eat them right away, you'll get the full benefit of the plants' free radical fighting prowess. Barring that situation, though, produce that was flash frozen at the peak of nutrient power is actually your best bet.