Illustration
Diamantina Clematis
Clematis 'Evipo039'
Also called regal diamantina clematis
Also comes in blue.
Diamantina Clematis blooms from May through June.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Diamantina Clematis
Plant it in full sun. It prefers moderate water. It is hardy in USDA zones 4–9. Expect it to reach about 7 ft tall and 2.5 ft wide at maturity, in roughly 3 years (a house reading).
Is Diamantina Clematis toxic to dogs or cats?
- Listed as toxic to dogs and cats by NC State Extension.
- Listed as poisonous to people by NC State Extension.
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 Diamantina Clematis
Plant Diamantina Clematis 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 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 March. Derived from the plant's category, zones and bloom months plus typical zone frost dates, not checked separately.
How big does Diamantina Clematis get?
7 fttall5 ft 7 inan adult2.5 ftwideSee Diamantina Clematis 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 Diamantina Clematis
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Space Diamantina Clematis about 2.5 ft apart, center to center, so each plant has room to reach its full width.
Add Diamantina Clematis 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
Diamantina Clematis' height, spread, hardiness zones, sun, water, bloom months and color and trait tags were checked against 8 published sources on October 20, 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.
- Plant Addictsheight, spread, hardiness zones, sun, water, bloom months and color and trait tags
- gardencrossings.comGarden Crossings (Zeeland, Michigan)height, spread, hardiness zones, sun, bloom months and color and trait tags
- redwoodnursery.comRedwood Nursery & Garden Center (Swansea, Massachusetts)height, spread, hardiness zones, sun and bloom months and color
- RHSRoyal Horticultural Societyheight, sun, water, bloom months and color and trait tags
- raymondevisonclematis.comRaymond Evison Clematis (Guernsey Clematis Nursery)height, hardiness zones and bloom months and color
- donahuesclematis.comDonahue's Clematis (Faribault, Minnesota)height and bloom months and color
- active.inspection.gc.caCanadian Food Inspection Agency, Plant Breeders Rightsbloom months and color
- NC State ExtensionPlant Toolboxsun and water
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.