Clearing away dead foliage and debris from around your peony plants is essential to prevent diseases such as botrytis, which thrives in moist, decaying plant material. Remove any old leaves or mulch from the previous season that might harbor fungal spores.
After cleaning up the area, apply a fresh layer of mulch to help retain moisture and regulate soil temperature. However, ensure the mulch is kept a few inches away from the stems to prevent rot.
7. Feed Peonies Lightly And Refresh The Soil Around Them
Peonies benefit from a light application of balanced fertilizer in early spring as new growth begins. Use a fertilizer with an N-P-K ratio of around 10-10-10, and apply it according to package instructions, being careful not to over-fertilize, as this can lead to lush foliage at the expense of blooms.
Refreshing the soil with a bit of compost or well-rotted manure can also provide nutrients and improve soil structure. Be sure to mix these into the top layer of soil without disturbing the roots.
8. Support Stems And Space Plants To Improve Airflow
Peony stems, especially those of large-flowered varieties, can be weak and may require support to prevent them from flopping over as buds develop. Install peony rings or stakes early in the season to give the plants adequate support.
Ensuring proper spacing between plants is also essential for good airflow, which helps prevent fungal diseases. If your peonies are crowded, consider thinning them out in the fall by digging and dividing crowded clumps. Proper support and spacing will promote healthier plants and more impressive blooms.
