Perennial peonies return each spring with bright blooms and continue to produce deep green foliage throughout summer and into fall. Peony plants reach heights of 2 to 4 feet and are a striking addition to a patio or walkway container. Peonies come in pink, yellow, white, red and many shades between. They require very little maintenance to grow strong and healthy. Plant nursery grown peonies in containers in spring after frost danger is passed or transplant garden peonies to containers in the fall for next year's blooming.
Gather containers that are at least 12 inches in diameter and 8 inches deep. Choose pots with plenty of drainage holes or drill additional holes into the bottom of the pot before using.
Fill a container within 3 inches of the rim with a good potting mixture. Make your own by mixing 1 part compost, 1 part peat moss and 1 part vermiculite.
Plant each peony plant to the same depth it was planted in the nursery container. Avoid covering the crown of the plant with soil or it will not produce flower buds. If planting un-sprouted tubers, plant each tuber 1 inch beneath the soil surface.
Water the pot thoroughly so the soil is evenly moist throughout. Keep the soil moist at all times through spring, summer and autumn until the plant goes dormant.
Fertilize with a balanced liquid fertilizer every four weeks throughout spring and summer. Container plants require more frequent fertilization than garden plants.