Purple moor grass, Molinia caerula subsp. arundinacea ‘Transparent’, creates a glorious golden "fountain" every autumn.
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Viola walterii 'Silver Gem' grows along the boxwood hedge surrounding the Reflecting Pool Terrace.
Did you know that trees and shrubs develop flower buds in late summer and autumn for the next spring and summer? Robust rhododendron buds near the Garden of the Gods: