Illustration
Adam's Courage Clematis
Clematis 'Adam's Courage'
Adam's Courage Clematis blooms from June through September.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Adam's Courage Clematis
Plant it in full sun. It prefers moderate water. It is hardy in USDA zones 4–7. Expect it to reach about 5.5 ft tall and 2.5 ft wide at maturity, in roughly 3 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 Adam's Courage Clematis
Plant Adam's Courage 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 5, the middle of its hardy zones 4 to 7, spring means April to June and fall means August or September. Once settled, it blooms from June to September.
Month-by-month timing for your zone is on the planting calendar; if you garden near zone 5, the middle of this plant's hardy range, start with zone 5 in April. Derived from the plant's category, zones and bloom months plus typical zone frost dates, not checked separately.
How big does Adam's Courage Clematis get?
5.5 fttall5 ft 7 inan adult2.5 ftwideSee Adam's Courage 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 Adam's Courage Clematis
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Space Adam's Courage Clematis about 2.5 ft apart, center to center, so each plant has room to reach its full width.
Add Adam's Courage 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
Adam's Courage Clematis' height, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil, diseases, pests and toxicity were checked against 11 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.
- Plant Addictsheight, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil and pests
- gardencrossings.comGarden Crossings (Zeeland, Michigan)height, spread, hardiness zones, sun, water, bloom months and color and trait tags
- Sooner Plant FarmOklahomaheight, spread, hardiness zones, bloom months and color, trait tags, soil and diseases
- extensionpubs.unl.eduNebraska Extension (University of Nebraska-Lincoln), G1861 Clematissun, water, bloom months and color, soil, diseases and pests
- romencegardens.comRomence Gardens & Greenhouses (Grand Rapids, Michigan)height, spread, hardiness zones, sun, bloom months and color and trait tags
- campbellsnursery.comCampbell's Nursery (Lincoln, Nebraska)height, spread, sun and bloom months and color
- donahuesclematis.comDonahue's Greenhouse (the breeder, Faribault, Minnesota)height, bloom months and color and trait tags
- hummingbirdfarm.netHummingbird Farm (Turner, Maine)height, hardiness zones and bloom months and color
- NC State Extensionthe GENUS pagesun, soil, pests and toxicity
- University of Illinois ExtensionIllinois Extension, Flowers: Clematisbloom months and color and soil
- ASPCAAnimal Poison Control Centertoxicity
How the checking works, and what each standard covers, is on the verified plants page.
Good to know about Adam's Courage Clematis
Curated from university extensions, botanic gardens and other primary sources, with the source named on every note.
Safety
In the buttercup family; the sap's protoanemonin irritates and can blister skin, and it sickens dogs, cats and horses. NC State rates its poison severity high. per NC State and ASPCA
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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.