First growing season for downtown Iowa City rooftop garden


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Seedlings begin in a smaller, raised hydroponic bed. (Jenna Ladd/CGRER)
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PVC pipes deliver nutrient-rich water that will flow through root systems in lieu of soil. (Jenna Ladd/CGRER)
Jenna Ladd | July 6, 2016

An Iowa City business owner has begun growing hydroponic vegetables on his downtown rooftop.

Mark Ginsberg, owner of a jewelry design studio and store called M.C. Ginsberg, has around 35 square-feet of hydroponic plants growing atop his business. Hydroponic gardens are systems in which plants can grow without soil, receiving the bulk of their nutrients from natural fertilizers in water like worm or fish waste. This nutrient rich water flows under plants and through root systems to sustain plant growth. Chad Treloar, Ginsberg’s construction lead for the project, built the garden with inexpensive, easy to acquire materials like PVC pipe, wood, and food-grade tubs.

In an interview with the Gazette, Ginsberg said that it would be possible to turn all urban Iowa City rooftops into food growing operations like his. He will harvest cucumbers, peas, and tomatoes first; he plans to give his bounty away to local restaurants and bars. In the coming years, MC Ginsberg’s garden will aim to sell its produce, depending on vegetable quality and yield dependability. Local restaurants seem eager to support the project, Oasis Falafel has already asked for all of the MC Ginsberg cilantro harvest.

In the long-term, Ginsberg is working to make hydroponic garden designs available to other downtown business owners. He aims to create a system that would allow owners to input rooftop dimensions and receive a cheap plan for hydroponic garden construction in return. He expects he could make these plans available for as little as 99 cents.

Green-roofs like these offer advantages to growers like runoff delay and stormwater management, improved air quality, and healthy foods with a small carbon footprint.

Iowa City Downtown District Executive Director Nancy Bird said the district is looking to back more projects like Ginsberg’s as a part of their larger sustainability focus for the downtown area.

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