Fertilize in the spring and mulch in the winter for best growth. Peonies live for many years in a landscape and for optimal flowering should be placed in permanent locations. If a peony fails to bloom after three years in the same location, it is most likely due to being planted too deeply. When planting, roots should be placed no more than one inch below the soil surface. Ants are attracted to the nectar on the buds, but are not necessary for the flowers to open.
Peonies occasionally have problems with spider mites and powdery mildew in Colorado.
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