Peony Plant
Q.

Peony Leaf Blotch/Measles

Zone Arden NC 28704 | pansy704 added on May 7, 2019 | Answered

Espoma Organic Neem Oil sufficient to treat peony bush? Have removed affected leaves...

A.
A.Answers to this queston: Add Answer
Downtoearthdigs
Certified GKH Gardening Expert
Answered on May 8, 2019

Spots on peony leaves or mold on the plants is usually caused by one of two peony fungal diseases, botrytis blight (gray mold) or leaf blotch.

These diseases tend to show up in wet weather and plants that are infected early in the season may have severe leaf damage by late summer.
Neem Oil won't hurt, but avoid overhead watering, try to increase airflow in the area. Remove spent flower heads right away and cut back the plants in fall and discard the foliage. (do not compost)
https://www.gardeningknowhow.com/ornamental/flowers/peony/treating-spotted-peony-leaves.htm

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