Growing jobs in a not too top notch ecomony is great news for Mainers. New England’s newest and largest greenhouse is growing opportunity. Maine Gov. John Baldacci picked several tomatoes off the vine onTuesday at a celebration of the first harvest.Over the summer, Backyard Farms completed construction on an 18-acre glass-covered greenhouse. With its completion there are now two greenhouses totaling 42 acres, with 450,000 tomato plants. For the new greenhouse, 75 workers were hired during the summer, expanding the work force to 200 employees.Backyard Farms harvested its first tomatoes in 2007 and has nowsold about 40 million pounds to stores across the Northeast.