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Outdoor Plants

Growing Itoh Peonies in Ontario

March 17, 2020 3 min read

Did you know Itoh peonies are a hybrid between tree peonies and herbaceous peonies?

In 1948, Japanese horticulturist Dr. Toichi Itoh created seven peony hybrids from a tree peony bred with a herbaceous peony.

Itoh peonies have vibrant double-flowers with a vigorous growth habit, reaching up to three feet tall. They peonies produce primary and secondary blooms which allows them to have an extended blooming period, with as many as 50 flowers in a season! The deep green foliage is disease resistant, even after blooming you’ll have a lush plant to fill your garden.

How to Grow Itoh Peonies

Similar to herbaceous peonies, they prefer an area that receives full sun but protected from the direct, long period of exposure to afternoon sun. They grow best in soil that is rich and well-drained. They can be sensitive to high levels of nitrogen; if you are doing any fertilizing, use one that has low levels of nitrogen.

When autumn arrives, cut back Itoh peonies 4 to 6 inches up from the soil. You can also divide peonies at this time. Do not fertilize in late summer to autumn.

Our Favourite Varieties

Berry Garcia Peony
Berry Garcia
Caroline Constabel Peony
Caroline Constabel
Gordon E. Simonson Peony
Gordon E. Simonson
Julia Rose Peony
Julia Rose
Lollipop Peony
Oochigeas Peony
Raggedy Anne Itoh Peony
Raggedy Anne
Scarlet Heaven Itoh Peony
Scarlet Heaven
Scrumdidleumptious Itoh Peony
Sequestered Sunshine Itoh Peony
Sequestered Sunshine
Strawberry Crème Brûlée Itoh Peony
Strawberry Crème Brûlée
Watermelon Wine Itoh Peony
Watermelon Wine