Illustration
Cora Louise Itoh Peony
Paeonia 'Cora Louise'
Also comes in purple and yellow.
Cora Louise Itoh Peony blooms from May through June.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Cora Louise Itoh Peony
Plant it in full sun. It prefers moderate water. It is hardy in USDA zones 4–8. Expect it to reach about 2.5 ft tall and 3 ft wide at maturity, in roughly 3 years (a house reading).
Is Cora Louise Itoh Peony toxic to dogs or cats?
- Listed as toxic to dogs and cats by NC State Extension, Pet Poison Helpline and Royal Horticultural Society.
Lists differ and none is complete. If a pet eats a plant and seems unwell, call a veterinarian or a pet poison helpline.
What was checked
Nine facts were checked against named botanical sources, each recorded beside the sources that carried it: mature height and spread, hardiness zones, sun, water, bloom months and color, the trait tags, and years to mature size, which rests on a recorded house rule where no publisher states one and is marked so. Soil, diseases, pests, toxicity and the plant's own names have not yet been read for this plant, and its trait tags are the ones a feature uses rather than every word a page prints. Each fact above carries its own mark. The planting, spacing and size sections are derived from these checked facts by a fixed rule, not checked separately, and the plant type is the library's own classification.
When to plant Cora Louise Itoh Peony
Cora Louise Itoh Peony is planted in fall: set bare roots out August or September across zones 4 to 8, well before the ground freezes. It blooms from May to June.
Month-by-month timing for your zone is on the planting calendar; if you garden near zone 6, the middle of this plant's hardy range, start with zone 6 in August. Derived from the plant's category, zones and bloom months plus typical zone frost dates, not checked separately.
How big does Cora Louise Itoh Peony get?
2.5 fttall5 ft 7 inan adult3 ftwideSee Cora Louise Itoh Peony in a garden plan: the planner shows it in 3D beside everything else you add, growing toward this size over the years.
How far apart to plant Cora Louise Itoh Peony
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Space Cora Louise Itoh Peony about 3 ft apart, center to center, so each plant has room to reach its full width.
Add Cora Louise Itoh Peony to a garden plan and the planner draws it at its full width, so you see the spacing before you buy.
Where these facts come from
Cora Louise Itoh Peony's height, spread, hardiness zones, sun, water, bloom months and color and trait tags were checked against 9 published sources on October 18, 2026. Each one is linked below with every fact it carried, which can include a fact this page still marks as not yet checked, because a source carrying a value is not the same as the value being held to the standard. Facts not in that list, and the planting, spacing and size sections, are not covered by these sources.
- Missouri Botanical Gardenheight, spread, hardiness zones, sun, water, bloom months and color and trait tags
- Plant Addictsheight, spread, hardiness zones, sun, water, bloom months and color and trait tags
- hollingsworthpeonies.comHollingsworth Peonieshardiness zones, sun, bloom months and color and trait tags
- jcra.ncsu.eduJC Raulston Arboretum, NC State Universitysun, bloom months and color and trait tags
- RHSRoyal Horticultural Societywater, bloom months and color and trait tags
- americanpeonysociety.orgAmerican Peony Societybloom months and color and trait tags
- Chicago Botanic Gardenhardiness zones and bloom months and color
- Iowa State University Extensionand Outreachbloom months and color and trait tags
- NC State ExtensionGardener Plant Toolboxsun and bloom months and color
How the checking works, and what each standard covers, is on the verified plants page.
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Design a garden with this
Drop this plant onto a 3D plan, see how it fills in, and watch your whole garden bloom across the year.