South Boston rooftop farm raising its first crops ← Related Article Visit The Boston Globe Share on Twitter Share on Facebook Comment on this Scroll to top of page David L. Ryan/Globe Staff Courtney Hennessey, co-founder of the Higher Ground Farm atop the Boston Design Center, tended to tomato plants. David L. Ryan/Globe Staff Hennessey and co-founder John Stoddard (pictured) are using 1,400 milk crates as planters. David L. Ryan/Globe Staff The urban farmers are sprouting tomatoes, basil, and arugula. Essdras M. Suarez/Globe Staff In April, before 25 tons of dirt were hauled in, the roof stood empty. Essdras M. Suarez/Globe Staff A view of Boston from Higher Ground Farm in April. At full build-out, the farm will span 55,000 square feet. Essdras M. Suarez/Globe Staff Hennessey posed on the empty roof in late April.