Why Has My Japanese Peony Developed A Yellow Peony In The Centre Of An Otherwise Deep Pink Peony. The Yellow

Question

the peony is at least 10 years old. The yellow flowes are very ruffled and full.

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Answer 1

It could be a sport, or mutation. It will probably be normal next year. Here is more:

https://www.gardeningknowhow.com/garden-how-to/info/plant-sport-mutations.htm