Swallowtails were early at The Garden Guy’s house this year. Thank goodness I had Superbena verbenas in full bloom. It is as if they had been given the task of announcing the arrival of spring and the butterfly season. On March 22, I photographed an eastern tiger swallowtail on Superbana Royale Chambray verbena. Your first thought might be, if it was in full bloom March 22 when did I plant it? The answer is in October. That is also when I planted Superbena Royale Plum Wine, which offers one of the rarest orchid colors in the garden. Now before you start thinking you have missed the verbena boa…