How many of us gardeners dream of a big piece of land to call our own and let our plant obsessions run wild? For Bruce Wakefield and Jerry Grossnickle, creators of Old Germantown Gardens, that dream is reality. They’ve been gardening here for over 30 years and have transformed a scrubby 5-acre property into a plant paradise. Bruce is heavily involved in HPSO, having served as president for years, and countless visitors have toured his garden. The garden is probably best known for the stunning displays of Giant Himalayan Lilies in summer, but I got the chance to visit in…