Illustration
Variegated Japanese Water Iris
Iris ensata 'Variegata'
Variegated Japanese Water Iris blooms from June through July.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Variegated Japanese Water Iris
Plant it in full sun. It prefers moderate water. It is hardy in USDA zones 4–9. Expect it to reach about 2.5 ft tall and 1.5 ft wide at maturity, in roughly 2 years (a house reading).
What was checked
Mature height and spread, hardiness zones, sun, water, bloom months and color and the trait tags were checked against named botanical sources for this plant, with what the sources could not settle written down; years to mature size rests on a recorded house rule where no publisher states one, and is marked so; its common name and alternate names have not been checked yet. 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 Variegated Japanese Water Iris
Plant Variegated Japanese Water Iris in early spring as soon as the soil is workable, or in early fall at least six weeks before your first frost, so roots establish in cool weather. In zone 6, the middle of its hardy zones 4 to 9, spring means March to May and fall means August or September. Once settled, it blooms from June to July.
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 March. Derived from the plant's category, zones and bloom months plus typical zone frost dates, not checked separately.
How big does Variegated Japanese Water Iris get?
2.5 fttall5 ft 7 inan adult1.5 ftwideSee Variegated Japanese Water Iris 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 Variegated Japanese Water Iris
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Space Variegated Japanese Water Iris about 1.5 ft apart, center to center, so each plant has room to reach its full width.
Add Variegated Japanese Water Iris 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
Variegated Japanese Water Iris' height, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil, diseases, pests and toxicity were checked against 6 published sources on September 26, 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 GardenIris ensata, SPECIES pageheight, spread, hardiness zones, sun, water, bloom months and color, soil, diseases and pests
- RHSRoyal Horticultural Societyheight, spread, sun, water, bloom months and color, soil, diseases, pests and toxicity
- NC State ExtensionIris ensata, SPECIES pageheight, hardiness zones, sun, bloom months and color, soil, diseases, pests and toxicity
- Plant Addictsthe queue's storeheight, spread, hardiness zones, sun, water, bloom months and color, trait tags and pests
- Perennials.com (Heritage Perennials)Valleybrook International Ventures / Heritage Perennialsheight, spread, hardiness zones, bloom months and color, soil, pests and toxicity
- Chicago Botanic GardenPlant Finderhardiness zones, sun, water and bloom months and color
How the checking works, and what each standard covers, is on the verified plants page.
Good to know about Variegated Japanese Water Iris
Curated from university extensions, botanic gardens and other primary sources, with the source named on every note.
Safety
Toxic to dogs, cats and horses; the rhizome is the most toxic part. Eating it causes drooling, vomiting, diarrhea and lethargy. Sap can irritate skin. per ASPCA and NC State
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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.