Answer: Some of the most colorful perennials suitable for your gardening region include
Peony 'Alma Hansen', Lilium 'Star Gazer' (Oriental Lily), Phlox paniculata 'Franz Schubert', Peony 'Longfellow', Eryngium planum - Sea Holly, Helenium autumnale (Sneezeweed) 'Butterpat', Papaver orientale - Oriental Poppy, Liatris spicata (Gay Feather, Dense Blazing Star) 'Kobold', Achillea millefolium (Yarrow) 'Cerise Queen',
Campanula persicifolia (Peach-leaved Bellflower) 'Blue Bloomers', Platycodon grandiflorus - Balloon Flower, Lilium 'Corsica' (Asiatic Lily), and Achillea (Yarrow) 'Moonshine'. Since you have some idea of what you'd like to plant where, I would encourage you to draw or sketch out each of the garden beds on graph paper, drawing in the plants so you'll get an idea of the overall affect. Enjoy your new garden!
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