Such an enigmatic, nearly black shade of purple is an asset to all sorts of color palettes. It adds depth to the pastel purples and pinks so common to spring, to the fiery reds and yellows and to the icy blues. Really, whatever your mixed spring border looks like, Obsidian will heighten the drama. We also love its wide, rolling ruffles in elegant cut-flower arrangements. Perfect for a dinner party. This bearded iris grows to a mature height of around 30-33" tall, good for the mid-border. It's tall enough you can put some soft-toned hyacinths in front of it, compact enough for towering tulips behind. Iris germanica 'Obsidian'