"Structure is the most important component in a successful planting," wrote Piet Oudolf in his book, Designing With Plants. Indeed, Oudolf believes that by concentrating on the structure of each plant, one can create a garden that is interesting to look at through several seasons, not just during bloom time. This was one of the principles employed when he designed the plantings of the Lurie Garden - selecting plants for their shape and structure to make interesting combinations.
One such combination can be found in the Dark Plate where he used plumes and spires at the south stairs. In the foreground, is a stand of an ornamental grass, Calamagrostis 'Karl Foerster' (Feather Reed Grass) in bloom this month with pinkish bronze inflorescences. It will grow to six feet, creating a screen to highlight the spires of Digitalis ferruginea (Rusty Foxglove) blooming in front. This Digitalis has smaller blooms, doesn't require staking, and makes a nice companion to the reed grass screen. Above and behind these plants, creamy white plumes of Persicaria polymorpha (White Dragon Knotweed) add another dramatic screen, calling attention to the tips of the Feather Reed Grass. In the fall, the Digitalis will turn a sienna brown; the Calamagrostis inflorescences will blow out to buff-colored plumes; and the plumes of the Persicaria will become a lighter version of the Digitalis.
Tours begin at 10 am today. Look for signs pointing out Liatris spicata 'Alba,' Monarda didyma 'Scorpian,' and Agastache 'Blue Fortune.'
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