Most of the cultivars in the Midseason group result from crossing forms of Paeonia officinalis, Paeonia peregrine (lobata), or sometimes those species' close kin, with the later flowering, more commonly grown peonies of the Lactiflora Group. The hybrid progeny flowers are especially colorful, either rich, brilliant reds, sometimes intensely pigmented, often ranging to near scarlet or soft pinks, peachy or orangey toned, some characterized as coral or salmon, which do not fade purplish, their colors remaining attractive to the end. In this group there is a fair selection of good bomb doubles, semi-doubles and a few full doubles.

Mid-season Herbaceous plants are generally very suitable for landscaping. The bush habit of most is well constituted for flowering in the viewed landscape without mechanical support. However, under water-stress climate conditions some in this group will die off in mid-summer. Under high temperature and drought, some plants shut down, a survival adaptation from their natural species ancestors, such plants sometimes said to be "summer dormant". High shade, windscreen and judicious supplemental watering may delay the onset. Suitable placement of companion plants will help offset associated loss of greenery. Some will be tagged Best Landscaper^®.