Editor’s Note – Don’t have space around your house or apartment to have a yardfarm? No worries, just look to the roof! This farm in D.C. is the first of its kind in the area. If they can do a commercial farm, what’s to stop you from having your own small rooftop yardfarm?! Below is an article by Rose Egelhoff written for Seedstock that details this new rooftop farming effort.
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Rooftop Garden (Photo Credit: Karen Stintz)
Something’s growing atop D.C. restaurant Oyamel. Seedlings poke young leaves out of four inches of soil. The new green roof, which opened in May, is part of Up Top Acres, a network of rooftop farms.
Up Top Acres, founded by Kathleen O’Keefe, Kristof Grina and Jeffrey Prost-Greene, installs and farms green roofs around the city. They hope to partner with D.C. restaurants to offer fresh, local produce. At the same time, their green roofs provide energy savings and stormwater retention for the buildings where they are located, and the farms can be community centers for education and events.
The three young founders are D.C. natives and friends from high school. They went their separate ways in college, studied urban planning, agriculture and business then came back to Washington, D.C.
“We wanted to create something that we thought was missing in the city,” says O’Keefe, the UTA’s Director of Events and Communications. “There’s a strong urban agriculture community here already,” says O’Keefe. “D.C. has the most community gardens per capita of any city in the U.S. but there’s no one doing commercial farming in the city for rooftops.”
What’s so great about rooftop farms? “The idea behind it was two-fold: the urban agriculture aspect, but then it’s also that D.C. has this really big issue with stormwater,” says O’Keefe. She describes how the D.C. sewer system, overburdened with runoff, dumps polluted street water into the Potomac and Anacostia Rivers. Farming roofs captures stormwater while also producing food.
Plus, land in D.C. is expensive and much of the soil is contaminated, so it just “made sense to us to go to the rooftops,” says O’Keefe.
At the time, Grina was working as the personal gardener of Chef José Andres, founder of ThinkFoodGroup. Andres and ThinkFoodGroup co-founder Rob Wilder’s enthusiasm for farming and support for the rooftop garden idea helped Grina, O’Keefe and Prost-Greene to get off the ground. The three friends formed Up Top Acres, took out a loan and began building.
The team has now installed three roofs: the 700 square foot farm at Oyamel; a 500 square foot residential roof for private use, with extra produce going toward a small neighborhood CSA; and a 7000 square foot commercial green roof that they are retrofitting for agricultural use.
While Oyamel’s thin soil is only deep enough for shallow-rooted crops like microgreens and edible flowers, the commercial roof will be strong enough to support eight inches of soil, allowing a wider variety of vegetables to grow.
The biggest challenge, says O’Keefe, is that many existing buildings are not strong enough to support green roofs. The solution is to get to developers before construction begins. O’Keefe explains that planning for green roofs is mutually beneficial: building owners can rent out an otherwise unused space, and the city offers rebates for green roofs that cover almost half the cost of installation. The green roof protects the roof membrane, reduces energy bills by cooling the building, and generates stormwater retention credits, which can be traded and sold within D.C.
And with regulations going into effect this year that require new buildings to retain more stormwater, it’s a good time for green roofs.
These three roofs are only the first step. “By 2020 we want to have 150,000 square feet of growing space in the city,” says O’Keefe. They plan to partner with restaurants on eight small roofs, like the one at Oyamel, growing thin-soil specialty crops. Two flagship locations of roughly 40,000 square feet each, will produce a range of crops while acting as community hubs that can host events like yoga classes, beer tastings, and school group visits.
O’Keefe is glad to be part of the D.C. urban agriculture movement. “We’re all city kids,” she says. “We grew up in D.C., went to D.C. public high schools. There was no focus on agriculture in our education from K through 12.”
That gap in agricultural knowledge was brought home when O’Keefe’s sister came to O’Keefe’s work. “We had this planter installation outside a food hub in D.C.,” O’Keefe says. “We were just growing carrots and a variety of produce, and I brought my sister there, who is three years older than me. She pulled a carrot out of the planter box, and she had no idea that was how carrots grew, and she just, she started crying.”
“The connection back to agriculture is definitely happening in schools again,” says O’Keefe, “but I feel like it’s something that our generation missed out on a little bit so it’s just been cool to be able to bring that back and to be able to bring a little bit of nature back into these cities that we’ve built up so much.”
This story leads me to remember a creative effort at rooftop gardening in the late 1990s. Rev. Job Ebenezer, who did environmental work with the Evangelical Lutheran Church in America, helped set up small gardens on the top level of parking garages in Chicago. They used plastic wading pools to hold the soil, and had great results, at low cost, on structures designed to handle the weight. I don’t know if the project continued more than a few years.