Peony Leaves Turning White: Fixing A Peony With Powdery Mildew

by johnah on November 7, 2020

Peony leaves turning white are a common problem on peonies. They usually appear at the base of the petals and they look like white flakes or dust. Sometimes it looks like snowflakes have fallen from them. There are many reasons why peonies turn white, but there is no cure for this problem yet. The most common cause of this problem is too much water during blooming season (June – August). Too much water causes peonies to become stressed and eventually die. Soaking the flowers in a solution of one part bleach to ten parts water will kill powdery mildew spores. You can use this method on any type of flower including roses, hydrangeas, tulips, dahlias, lilies and other types of flowers.

How To Get Rid Of Powdery Mildew On Peonies?

If you want to get rid of powdery mildew on peonies, then you need to make sure that your peonies don’t get wet during bloom time. If they do, then the fungus will grow rapidly and quickly destroy the plant. You can soak your peonies in a solution of one part bleach to ten parts water. For example, if you’re soaking a bunch of peonies in water, add three cups of water per quart of water. Wait one hour before soaking your peonies in this solution. After one hour, the spores will be killed and there should be no more powdery mildew. The problem with this method is that it might also kill your peonies. If you’re careful and attentive during bloom time, then you shouldn’t have too many problems when it comes to using this method for getting rid of powdery mildew on peonies.

Other tips for getting rid of powdery mildew on peonies is to water your garden during the mornings, not the evenings. Make sure that the soil drains properly so that your peonies get enough water without getting too much. To test if your soil drains properly, stick a long wooden pole into the ground up to the shoulder. If it goes in easily, then your soil doesn’t drain well and you should add some coarse sand to it.

This will help drainage.

You can also try planting your peonies in pots and putting them in a part of your garden that gets morning sun, but is partially shaded in the afternoons. The soil should be a mix of loam, peat moss and sand. If you attempt this method, be sure to keep an eye on your peonies because they could become diseased if they’re sitting in water for too long. (Just make sure to water them in the mornings rather than the evenings.

Powdery mildew doesn’t have to be a fatal disease to your peonies. With a little bit of work and attention, you can get rid of powdery mildew on peonies so that they’ll continue to grace your garden with their beautiful blooms for many years to come.


Did you know that some of the Peony species can grow up to 3 feet in height?

Some can even reach 5 feet!

P.P.S. To learn more about different types of flowers and how to get rid of powdery mildew on them, please go here.

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Sources & references used in this article:

Guide for Control of Annual and Perennial Flower and Ground Cover Diseases in the Landscape by JR Hartman, ML Witt – 1996 –

Paeonia foemina see Peony officina Ie see Peony by A Puig, R pour Homme – 1992 – Springer

Like Not Like: Writing Portraits in The Peony Pavilion by A Burkus-Chasson – Journal of Chinese Literature and …, 2015 –

Natural Disease Control by B Hanson – 2000 –

Diagnosing plant problems by JL Green – Cooperative extension Service. University of Kentuck … –

Plant Disease Management in the Home Garden by MA Draper, HA Lamey – 1994 –

The Country Diary Book of Flowers: Drying, Pressing, And Potpourri by C Petelin – 2015 –

Pesticide Selection Guide for Plant Diseases Affecting Woody Ornamentals and Herbaceous Perennials in Nebraska by AD Ziems, LJ Giesler, N Wegulo… – … from University of …, 2007 –



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