Experts and BHG readers answer.
Blooming of peonies
Peonies often take a long time to get established, especially if they were started from very small divisions. If the plants are making large clumps of healthy foliage every year, they should be forming flower buds too. Several things can harm the buds before they open. One possibility is that the buds are freezing in late hard frosts. Fungus disease can damage buds in cool damp weather. A cold dry spring can stunt buds too; be sure your plants have enough moisture. Here are some additional reasons why peonies don't bloom. Not enough sunlight. Peonies need full sun in order to grow and bloom well. If your plant receives less than 6 hours of direct sunlight a day, move it to a sunnier spot. Heavy soil. Peonies like well-drained soil. If your soil is slow to drain, amend it with organic matter (such as compost) to encourage better drainage. Deep planting. If peonies are planted too deeply, the buds in the crown of the plant won't get enough light. Buds should be planted no more than an inch or two below ground level.