Illustration
Chater's Double Yellow
Alcea rosea 'Chater's Double Yellow'
Chater's Double Yellow blooms from June through August.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Chater's Double Yellow
Plant it in full sun. It prefers moderate water. It is hardy in USDA zones 3–8. Expect it to reach about 6 ft tall and 2 ft wide at maturity, in roughly 2 years (not yet checked).
What was checked
Mature height and spread, hardiness zones, sun and the trait tags were checked against named botanical sources for this plant. The bloom months and water need on this page were not, and each fact above says which. 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 Yellow
Plant Chater's Double Yellow 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 June 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 Chater's Double Yellow get?
6 fttall5 ft 7 inan adult2 ftwideSee Chater's Double Yellow 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 Yellow
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Space Chater's Double Yellow about 2 ft apart, center to center, so each plant has room to reach its full width.
Add Chater's Double Yellow 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 Yellow's height, spread, hardiness zones, sun and trait tags were checked against 9 published sources on July 29, 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.
- buchanansplants.comBuchanan's Native Plantsheight, spread, hardiness zones, sun and trait tags
- Outsideprideheight, spread, hardiness zones, sun and trait tags
- swiftgreenhouses.comSwift Greenhousesheight, spread, hardiness zones, sun and trait tags
- Breck'sheight, hardiness zones, sun and trait tags
- Longfield Gardensheight, hardiness zones, sun and trait tags
- Missouri Botanical GardenPlant Finderhardiness zones, sun and trait tags
- NC State ExtensionPlant Toolboxhardiness zones, sun and trait tags
- RHSAlcea rosea Chater's Double Group yellow-floweredheight, spread and sun
- University of Illinois ExtensionHort Answerssun
How the checking works, and what each standard covers, is on the verified plants page.
Good to know about Chater's Double Yellow
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.