Peonies can provide a big splash of color in a garden because of their bright, large blossoms. They require little care and maintenance, making them a great choice for many landscaped beds. Peonies can be grown in much of California, but they likely will not thrive in some areas. They can be grown in USDA hardiness zones 2 to 8, which includes much of northern and inland California. In southern regions or along the coast, the climate may be too warm for peonies.
Find a location that gets about six hours of full sun each day.
Dig a hole so the crown of the root ball will be 2 inches below ground after planting.
Place the plant in the hole with the eyes of the plant 1 to 2 inches underground.
Mix two or three handfuls of compost or other organic matter into the soil surrounding the plant.
Fill the hole in with dirt and organic compost or soil.
Firmly pat down the dirt around the plant to make sure no air bubbles remain.
Thoroughly water the newly-planted peonies so they can begin to establish a root system in the new location.