Reach for the sky with vines. Mailbox posts are perfect for Clematis or Trumpet vines. A variety of no-fuss perennials like salvia, lavender or ornamental grasses (Mexican Feathergrass for color all 4-seasons). Other varieties to hold up with summer heat Sedum, Poppy, Iris, Rosemary, Coreopsis, Petunias and Verbena. Mix in annuals to change out seasonally or to change your look every year.