To harvest blooms for bouquets, cut stems just as flower buds begin to open (leave at least three leaves to nourish the plant for the following year);
19+ Peony Plant Leaves Turning White. It?s likely due to powdery mildew. This mutation most often changes just the petal color, but occasionally will also alter leaf color.
Controling Powdery Mildew On Peonies Horticulture Talk from hyg.ipm.illinois.edu
Although infection often occurs in cool weather, the symptoms may not be visible until the sclerotinia sclerotiorum causes white mold to form on peonies. We have a few plants in a small garden. The weather was awful with strong winds but they have caught and the foliage is dying back now.
That plant looks terribly pot bound, it looks as if there's no dirt left and the plant is only being held up by the roots.
They all looked great this spring, but as summer hits, they look like they are loosing all green color. If plant leaves are turning white and dying, the underlying reason is most likely either sunscorch or powdery mildew. Years ago i saw a plant decsribed here locally in pennsylvania as the moravian peony. Peony eyes grow into the stems, leaves and flowers.
