The peony bush is a perennial that starts from a tuber. Growing 2 to 4 feet tall and wide, peonies flower in spring and into summer. Newly planted peonies go through a three-year growth cycle: year one, recovery from being planted with no flowers; year two, fill out with more branches and still no flowers; year three, flowers appear. If the peony does not produce flowers after four years in the ground, some corrections might need to be made in the care or location of the plant.
Spray the buds (if they appear) with a pesticide specifically designed for peonies. If buds appeared but were hit by a hard frost, they will not flower that year. The peony should flower the next year.
Transplant the peony to a different location in October or November if it is currently located under a tree or is in the shade of other plants. Peonies need at least six hours of full sun. If the peony was not struggling for sun and nutrients because of overcrowding, it could have been planted too deep. Dig up the peony and replant it at the same location about 2 inches higher out of the ground. Ensure the plant is situated in a well-drained area to help prevent root rot.
Water deeply when the ground is dry. In hot climates, water every seven to 10 days if there is no saturating rainfall.
Cut the peony to about 2 inches above the ground in the fall after it turns brown. Cutting the plant to the ground before it turns brown might prevent it from flowering the following spring.