The entire plant may wilt, or only a portion of it. Stunted plants and those not growing well should be removed. Float peonies, flower and all, in deep water in a bath overnight. Master Gardener Gardening Guides. They are one-fourth to a meter tall and are … There are no upcoming events at this time. Patience. Conditioning cut flowers . Peonies need a little time to mature. White mold: Can cause stem rot on peony. Tag Archives: peony wilt. Tobacco rattle, Tomato spotted wilt, Alfalfa mosaic viruses: No treatment is recommended if plants are only mottle but are growing well. The most common problem is peony wilt. Cut back herbaceous peonies in the autumn and remove the foliage. Scientists differ on the number of species that can be distinguished, ranging from 25 to 40, although the current consensus is 33 known species. A chilling hour is an actual hour (60 minutes) when air temperature remains between 32°F and 40°F. Peony bushes are herbaceous perennial floriferous plants with a single, large, colorful, aromatic flower at the end of the stem. Could you please advice what I should do? Peony. It’s not unusual to see the buds crawling with ants. It’s best to avoid planting peonies too closely together. Doing so discourages the dreaded Botrytis which could lead to peony wilt. Deadhead when the flowers begin to fade, cutting back to a strong leaf bud. Peony growing can be a little tricky in warmest regions because peonies need chilling hours to bloom. I am in Toronto, Sunny spot. The peony or paeony is a flowering plant in the genus Paeonia, the only genus in the family Paeoniaceae.Peonies are native to Asia, Europe and Western North America. This is a botrytis that causes the stems to rot. Search for: Events. Plants can also be moved in autumn. The best cure for all diseases is proper cleanup and maintenance of the plant. Hi, my herbaceous peony’s leaves are turning brown. Peony buds are very appealing to ants. Don’t worry, they won’t damage the plant. The relationships between the species need to be further clarified. Thanks,… Find it Here. Spent flowers should be removed and the plant should only be watered at the base. Peonies need a total of 500 to 1,000 chilling hours to flower. Although peonies have few problems, they are susceptible to some diseases. Peony wilt causes the buds to look mouldy and the stems to wilt. Peonies are perennials grown for their large, showy flowers.