While Mountain Mint (Pycnanthemum muticum) is indisputably the favorite of pollinators, it is another month before it begins flowering. So, what flowers do pollinators depend on until that time? Today, the answer is a single Oakleaf hydrangea (Hydrangea quercifolia, above and below) beside the koi pond patio. There are several more oakleafs in the garden,…