Dean and Susan Greenberg know their orchids. "The deep pink are the ones that are just coming out," Susan said. The retired couple are volunteer stewards at the Eshqua Bog in Hartland, and June is their busy season. "This place can be packed, especially on a weekend. So this coming weekend it will be very busy here," Susan said. This time of year, everywhere you look are orchids from the hundreds of lady's-slippers, to the rarer northern white or the green bog orchid.