Straw Foxglove, or Digitalis lutea, is another true perennial, evergreen Foxglove. It grows 2 to 3 feet tall and has 3/4 inch pale yellow, brown-speckled, nodding flowers borne along one side of the flower stems.
I have a slight obsession with green flowers. I just think it is the most interesting thing to have a green flower on green foliage. Granted, these are not true green like the Envy Zinnia, which I do not have.
But I do have the green hydrangea.
I am seriously considering making an all-green garden next year, somewhere near my hosta garden.