More than ten years ago I was given a piece of peony. This was a bit from a very old plant that had been in my parents' garden for as long as I can remember. I planted it in the garden and it seemed to do OK. It didn't thrive but it did flower for a few years.
It is still alive, but hasn't flowered for about four or five years. This is a shame as the flowers are lovely red doubles (I don't know what variety it is though), and I would like to know if there is anything I can do to get it going again. It's currently in full sun from about midday. The soil isn't great but I have an almost unlimited amount of horse manure at my disposal and I do put this around the garden regularly to try to improve things a bit.
Should I move it? Or is it just too old?
I do have another peony in similar conditions to the red one and that is doing really well.