Illustration
Frosty Fire
Dianthus 'Frosty Fire'
Frosty Fire blooms from May through July.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Frosty Fire
Plant it in full sun. It prefers low water. It is hardy in USDA zones 3–9. Expect it to reach about 10 in tall and 12 in 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 Frosty Fire
Plant Frosty Fire 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 9, spring means March to May and fall means August or September. Once settled, it blooms from May to July.
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 Frosty Fire get?
10 intall5 ft 7 inan adult12 inwideSee Frosty Fire 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 Frosty Fire
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Space Frosty Fire about 12 in apart, center to center, so each plant has room to reach its full width.
Add Frosty Fire 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
Frosty Fire'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.
- hoffienursery.comHoffie Nurseryheight, spread, hardiness zones, sun and trait tags
- Missouri Botanical GardenPlant Finderheight, spread, hardiness zones, sun and trait tags
- Nature Hills Nurseryheight, spread, hardiness zones, sun and trait tags
- Perennial Resource (Walters Gardens)height, spread, hardiness zones, sun and trait tags
- shop.myflowerland.comFlowerlandheight, spread, hardiness zones, sun and trait tags
- shop.wassonnursery.comWasson Nurseryheight, spread, hardiness zones, sun and trait tags
- Sooner Plant Farmheight, spread, hardiness zones, sun and trait tags
- greenwoodnursery.comGreenwood Nurseryheight, hardiness zones, sun and trait tags
- vanberkumnursery.comVan Berkum Nurseryheight, hardiness zones, sun and trait tags
How the checking works, and what each standard covers, is on the verified plants page.
Good to know about Frosty Fire
Curated from university extensions, botanic gardens and other primary sources, with the source named on every note.
Safety
Mildly toxic to dogs and cats: an unknown irritant causes mild stomach upset, and the leaves' saponins can cause mild skin dermatitis in sensitive people. 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.