It may sound like an oxymoron: a delicious local, winter tomato - especially if you happen to live in a cold weather climate.
But increasingly, farmers from W. Virginia to Maine and through the Midwest are going indoors to produce tomatoes and other veggies in demand during the winter months. "There's a huge increase in greenhouse operations," Harry Klee of the University of Florida tells us.
And surprisingly, according to skeptical foodies like chef Todd Wiss, the best greenhouse tomatoes come incredibly close to reproducing that taste of a perfectly-ripe, summer garden tomato. "It's amazing," Wiss told me after trying a greenhouse grown Gary Ibsen gold heirloom tomato.
These are a far cry from the flavorless supermarket tomatoes we typically find this time of year. When tomatoes are shipped long distances, they're usually harvested before they're ripe, which compromises taste. Plus, as we've reported before, some of the flavor of those supermarket varieties has been accidentally bred out as well.
The advantage of the new greenhouse model is that the tomatoes are grown not far from the cities where they're sold and eaten. And it's the locavore ethos that's driving this trend. "What's harvested today will be delivered to stores tomorrow," explains Paul Mock of Mock's Greenhouse in Berkeley Springs, W. Va.
If you listen to my story, you'll hear how Mock's business has boomed in the last few years, as retailers such as Wegmans and Whole Foods in the D.C. metro area snap up his heirloom and cherry tomatoes, as well as cucumbers and lettuces.
"There were times I had to pound the pavement" to sell produce Mock says. Now he's being paid a premium, since "locally-grown" produce is in high demand. "I'm finally having fun," he says.
Now even New Englanders can get summertime tasting, fresh tomatoes grown not too far from home. In Maine, Backyard Farms is leading the way. And vertical greenhouses are changing the landscape, too, from the new garden spot at Chicago's O'Hare Airport to Vertical Harvest of Jackson Hole, Wyo., which is just getting started.
So how do they grow? Many of these operations are turning to hydroponic farming, which means the plants are not grown in soil.
As we've reported before, soil is one key component of tomato flavor. But it's not the only one. The hydroponic tomatoes get their nutrients (and fertilizer) from liquid solutions fed directly via irrigation hoses. This typically requires less water and less land than traditional farming.
In fact, it uses up to 10 times less land and seven times less water per pound, according to Kate Siskel of Bright Farms, Inc., a company that's scaling up local produce by building greenhouses at or near supermarkets
Mock says there's another advantage of indoor growing: "We've had very little damage from bugs." And he's been able to avoid using chemicals on the leaves or fruit of his plants.