Stunted Peonies - Knowledgebase Question

oswego, NY
Question by stankon
May 28, 1999
About seven years ago I planted nine peony roots around an ornamental structural I built for my yard. The peonies were planted about three feet apart and receive full sun all day. Three of these plants do poorly each year, sending up a single stem or two and are way behind the others in their development. They seldom do much more during the growing season and never flower. The other plants do just great. What needs to be done to make them produce like the others and how can I promote more spreading of the flowering ones I have now?

Answer from NGA
May 28, 1999


Peonies generally grow to their mature size and stay that way, say about three feet across, so you can't make the vigorous ones spread bigger than they already are. Based on your description it's hard to tell why the three don't flower. However, one common cause is that they were planted too deeply. If they are a different type or color, it might also be that they are simply of a less vigorous variety. If they are all the same type and were planted approximately the same way, it might be that there is some difference in the soil, perhaps something underground you can't see such as a competing tree root or a different subsoil or perhaps even a different soil altogether (this can happen during the home construction process) or maybe even a difference in the surface runoff pattern. Finally, it is possible that they are suffering from some sort of root problem; you might wish to dig one up and see.

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