The peony is a rustic plant that produces a splendid flowering and is also very suitable for cultivation in areas where the winter climate is rather harsh, requiring no special precautions for its conservation.
The root system of peonies develops constantly from year to year. After about 2 or 3 years it is therefore almost always necessary to change the original pot by replacing it with a larger one or by planting the plant in the garden.
The best time to plant peonies, both bare-rooted and in pots, is from September to the last days of November; planting in autumn allows the peony to develop and branch its root system before the start of the vegetative restart. It is possible to plant in winter, as long as the soil is not frozen during the day.
After the month of March, peony plants can be planted, provided that they are grown in pots.
The most hospitable soil for peonies is fairly clayey, rich in humus, deep, permeable and well drained. The optimal pH is sub-acid or neutral: (6.5-7). It is important to loosen the soil before planting, possibly mix it with sand and peat and enrich it with organic fertilizers (very mature manure, compound vegetable conditioner, cornunghia, dried blood); it is good, however, to avoid direct contact of the roots with fertilizers.
One must try to avoid water stagnation as much as possible, for this purpose, in particularly damp soils, it is useful to place a 5 cm layer of gravel on the bottom of the planting hole. The peony, in fact, is more resistant in case of drought, rather than in the presence of an excessive quantity of water, which can easily provoke the onset of root rot.