Illustration
Chater's Double White
Alcea rosea 'Chater's Double White'
Chater's Double White blooms from June through August.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Chater's Double White
Plant it in full sun. It prefers moderate water. It is hardy in USDA zones 3–10. Expect it to reach about 6 ft tall and 2 ft wide at maturity, in roughly 2 years (a house reading).
Pets
- Not yet checked for pets.
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 Chater's Double White
Plant Chater's Double White 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 3 to 10, spring means March to May and fall means August or September. Once settled, it blooms from June to August.
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 Chater's Double White get?
6 fttall5 ft 7 inan adult2 ftwideSee Chater's Double White 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 Chater's Double White
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Space Chater's Double White about 2 ft apart, center to center, so each plant has room to reach its full width.
Add Chater's Double White 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
Chater's Double White's height, spread, hardiness zones, sun, water, bloom months and color and trait tags were checked against 7 published sources on October 22, 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.
- whiteflowerfarm.comWhite Flower Farmheight, spread, hardiness zones, sun, water, bloom months and color and trait tags
- RHSRoyal Horticultural Societyheight, sun, water and bloom months and color
- vandermeernursery.comVandermeer Nurseryheight, spread, sun and bloom months and color
- info.ballseed.comBall Seedheight, spread, hardiness zones and trait tags
- NC State Extensionsun, water and trait tags
- Missouri Botanical Gardensun and water
- ufseeds.comUrban Farmerheight and hardiness zones
How the checking works, and what each standard covers, is on the verified plants page.
Good to know about Chater's Double White
Curated from university extensions, botanic gardens and other primary sources, with the source named on every note.
Safety
Handling the foliage can cause skin irritation or contact dermatitis in some people, and mild stomach upset in animals that eat it. Wear gloves. per Cornell
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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.