Creating vertical interest in the garden is another dynamic design element. The eye is drawn upward and the sky becomes a ‘borrowed view’. Flower or foliage covered trellises, arbors, and pergolas work nicely. So do tall perennials like Thalictrum ‘Lavender Mist’ or ‘Slendide’ (6′-8′), many fountain and switch grasses, Joe Pye Weed (6′), Culver’s Root (5′), climbing vines (i.e., Clematis, climbing Hydrangea) and Rudbeckia maxima (8′). Ornamental trees (flowering and non-flowering) are also good ‘eye elevators’.
by Kerry Ann Mendez, Perennially Yours