Tom and Sarah Rumery, owners of New Castle's Osage Gardens, are celebrating 25 years of local, organic farming in 2017. Now the largest grower of fine organic culinary herbs in Colorado, the farm began with just six basil plants and now boasts nearly 6,000. Also grown on-site are over 20 other herb varieties including dill, marjoram, mint, oregano, tarragon, thyme,…