Illustration
Captain Kirk Hosta
Hosta 'Captain Kirk'
Captain Kirk Hosta blooms from July through August.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Captain Kirk Hosta
Plant it in part shade. It prefers moderate water. It is hardy in USDA zones 3–8. Expect it to reach about 2.5 ft tall and 3 ft wide at maturity, in roughly 3 years (a house reading).
Is Captain Kirk Hosta toxic to dogs or cats?
- Listed as toxic to dogs and cats by NC State Extension and Pet Poison Helpline.
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
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 Captain Kirk Hosta
Plant Captain Kirk Hosta 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 3 to 8, spring means April to June and fall means August or September. Once settled, it blooms from July to August.
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 Captain Kirk Hosta get?
2.5 fttall5 ft 7 inan adult3 ftwideSee Captain Kirk Hosta 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 Captain Kirk Hosta
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Space Captain Kirk Hosta about 3 ft apart, center to center, so each plant has room to reach its full width.
Add Captain Kirk Hosta 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
Captain Kirk Hosta's height, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil, diseases, pests and toxicity were checked against 11 published sources on October 13, 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.
- Walters Gardensheight, spread, hardiness zones, sun, water, bloom months and color, trait tags and soil
- Perennials.com (Heritage Perennials)Heritage Perennials, Valleybrook International Venturesheight, spread, hardiness zones, sun, water, bloom months and color and trait tags
- gertens.comGertens Garden Center (its product information and NetPS entry)height, spread, hardiness zones, water, bloom months and color and trait tags
- RHSRoyal Horticultural Societyheight, sun, water, trait tags, soil, diseases and pests
- NC State ExtensionHosta genus pagesun, trait tags, soil, diseases, pests and toxicity
- Plant AddictsProven Selections / Proven Winners retailerheight, hardiness zones, sun, water, soil and pests
- ahshostahelper.comThe Hosta Helper (American Hosta Society)height, spread and bloom months and color
- Chicago Botanic GardenPlant Finderhardiness zones, bloom months and color and trait tags
- hostaregistrar.orgAmerican Hosta Society, Hosta Registrybloom months and color and trait tags
- Iowa State University Extensionand Outreach, Yard and Gardenheight and spread
- Proven WinnersWalters Gardens catalog, hosted by Proven Winnersbloom months and color
How the checking works, and what each standard covers, is on the verified plants page.
Good to know about Captain Kirk Hosta
Curated from university extensions, botanic gardens and other primary sources, with the source named on every note.
Safety
Toxic to dogs, cats and horses. All parts contain saponins; eating it causes vomiting, diarrhea and depression (lethargy). 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.