Urban farming was way more than a fad in the 1940s.

Urban gardening may be catching on now, but today's urban gardeners have nothing on their grandparents. During the World Wars, the U.S. government urged citizens to plant their own small vegetable gardens. It was a super positive spin on "We don't have enough war rations."

When the government asked them to grow cabbage in their front yards, around 20 million families planted victory gardens. They grew 40 percent of the country's vegetables by 1944.

Naturally, the government wanted to remember this successful project, so it kept a collection of photos. TreeHugger posted a few of these pictures, which you can check out here.