Illustration
Hardy Hibiscus
Hibiscus moscheutos
Also called rose mallow and dinner plate hibiscus
Hardy Hibiscus blooms from July through September.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Hardy Hibiscus
Plant it in full sun. It prefers high water. It is hardy in USDA zones 5–9. Expect it to reach about 4 ft tall and 3 ft wide at maturity, in roughly 2 years (not yet checked).
No toxicity note is on file for Hardy Hibiscus. That is not a clearance: check its safety for people and pets before planting.
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 Hardy Hibiscus
Plant Hardy Hibiscus 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 7, the middle of its hardy zones 5 to 9, spring means March to May and fall means September or October. Once settled, it blooms from July to September.
Month-by-month timing for your zone is on the planting calendar; if you garden near zone 7, the middle of this plant's hardy range, start with zone 7 in March. Derived from the plant's category, zones and bloom months plus typical zone frost dates, not checked separately.
How big does Hardy Hibiscus get?
4 fttall5 ft 7 inan adult3 ftwideSee Hardy Hibiscus 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 Hardy Hibiscus
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Space Hardy Hibiscus about 3 ft apart, center to center, so each plant has room to reach its full width.
Add Hardy Hibiscus 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
Hardy Hibiscus' height, spread, hardiness zones, sun and trait tags were checked against 5 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.
- Clemson Home and Garden Information CenterClemson Cooperative Extension Home and Garden Information Centerheight, spread, hardiness zones, sun and trait tags
- Missouri Botanical Gardenheight, spread, hardiness zones, sun and trait tags
- NC State ExtensionPlant Toolboxheight, spread, hardiness zones, sun and trait tags
- University of Illinois Extensionheight, hardiness zones, sun and trait tags
- Lady Bird Johnson Wildflower Centerheight, sun and trait tags
How the checking works, and what each standard covers, is on the verified plants page.
Comes in 11 varieties across 3 colors
Same genus, similar care - pick the color you are growing.
- Berry Awesome
- Cherry Choco Latte
- Cranberry Crush
- Holy Grail
- Kopper King
- Lady Baltimore
- Lord Baltimore
- Luna Pink Swirl
- Luna White
- Midnight Marvel
- Summer Storm
Compare every variety in the Hardy Hibiscus group
Every figure is the variety's own page fact. Tap a name to open it.
| Variety | Color | Blooms | Hardiness | Sun | Size (H × W) |
|---|---|---|---|---|---|
| Berry Awesome | Pink | Jul–Sep | Zones 5–9 | Full sun | 4 ft × 3.5 ft |
| Cherry Choco Latte | Pink | Jul–Sep | Zones 5–9 | Full sun | 4 ft × 3.5 ft |
| Cranberry Crush | Red | Jul–Sep | Zones 5–9 | Full sun | 3.5 ft × 3.5 ft |
| Hardythis page | Pink | Jul–Sep | Zones 5–9 | Full sun | 4 ft × 3 ft |
| Holy Grail | Red | Jul–Sep | Zones 5–9 | Full sun | 4 ft × 3.5 ft |
| Kopper King | Pink | Jul–Sep | Zones 5–9 | Full sun | 3.5 ft × 3.5 ft |
| Lady Baltimore | Pink | Jul–Sep | Zones 5–9 | Full sun | 4.5 ft × 3 ft |
| Lord Baltimore | Red | Jul–Sep | Zones 5–9 | Full sun | 4.5 ft × 3 ft |
| Luna Pink Swirl | Pink | Jul–Sep | Zones 5–9 | Full sun | 2.5 ft × 2 ft |
| Luna White | White | Jul–Sep | Zones 5–9 | Full sun | 2.5 ft × 2 ft |
| Midnight Marvel | Red | Jul–Sep | Zones 5–9 | Full sun | 4 ft × 3 ft |
| Summer Storm | Pink | Jul–Sep | Zones 5–9 | Full sun | 4 ft × 3.5 ft |
Good to know about Hardy Hibiscus
Curated from university extensions, botanic gardens and other primary sources, with the source named on every note. A note reports what its source says; where that differs from a fact above, the fact above is this entry's stored value, and its mark says whether it has been checked.
Worth knowing
It is famously late to break dormancy, often showing no shoots until late spring or early summer. Do not assume it died over winter and dig it up. per Wisconsin and Missouri Botanical Garden
When to cut it back
Cut the dead stems to a few inches while dormant. Autumn is fine, but waiting until late winter leaves the hollow stems standing to shelter overwintering native bees. per Clemson and Wisconsin
Dinner-plate flowers
The signature trait: enormous saucer flowers about 10 to 25 cm (4 to 10 in) across, in white, pink, red or burgundy, each open for just one day. per NC State
Loves wet soil
One of the few perennials that thrives in a soggy spot, rain garden, or pond edge, even tolerating short periods of shallow standing water. per Clemson
Japanese beetle
A favorite target: adults skeletonize the leaves and chew the flowers, and heavy numbers defoliate fast. Handpick into soapy water; traps lure in more than they kill. per UGA
Hibiscus sawfly
Pale-green larvae skeletonize leaf undersides and can defoliate the plant. Handpick or hose them off, or use insecticidal soap. Bt does not work: a sawfly is not a caterpillar. per NC State
What pairs well with Hardy Hibiscus
Good companions share its growing conditions and add something it lacks: an earlier or later bloom, a lower carpet in front, or structure through winter.
English Daisy
Shares full sun and moderate to high water; blooms in mid spring, before this one opens; low at 6 in, to carpet the ground beneath; both offer pollinator forage, in different months.
Winterberry
Shares full sun and high water; blooms in mid fall as this one finishes; both offer pollinator forage, in different months; both are North American natives.
White Clover
Shares full sun and moderate to high water; opens in late spring and overlaps into this one's season; low at 4 in, to carpet the ground beneath; both offer pollinator forage.
Aster
Shares full sun and moderate to high water; overlaps, then carries the display into mid fall; its seed heads stand through winter, for structure and the birds; both offer pollinator forage.
Chives
Shares full sun and moderate to high water; blooms in late spring, before this one opens; both offer pollinator forage, in different months; lower at 12 in, for the front of the border.
Pansy
Takes full sun to part sun and moderate to high water; blooms in early spring, before this one opens; lower at 8 in, for the front of the border; both offer pollinator forage, in different months.
Ninebark
Shares full sun and moderate to high water; blooms in late spring, before this one opens; both offer pollinator forage, in different months; both are North American natives.
Hyacinth
Shares full sun and moderate to high water; blooms in early spring, before this one opens; lower at 10 in, for the front of the border; both offer pollinator forage, in different months.
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