Over the last several years my double FLP has greatly diminished in size, with this year basically only one stem. I also noted it to be very late to emerge both years. I've had this plant probably 10-15 years. There is some competition from other plants in its vicinity, could this be a cause? Could it be approaching the end of its lifespan? ( I know regular peonies can live many years but not sure about the FLP.) Should I try moving it to a new bed where there is less competition? Any advice, suggestions appreciated.