I have 5 peony bushes about 12 years old and they now grow about 3 ft high and wide and produce about 2 dozen lovely flowers per plant.
1. After they bloom and the flowers are gone: What difference is it if I cut it back or if I let the green foliage continue growing? I like a more compact bush for the following year.
2. Each plant has maybe 20 stalks coming out of the ground: When and how is the best way to divide them?